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Full text of "Sewaren Generating Station"

SEW/^REN 



GENERATING STATION 



Public Service Electric and Gas Company 



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SEWAREN 

GENERATING STATION 



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Public Service Electric and Gas Company 

NEWARK, NEW JERSEY 



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FOREWORD... 

I HIS ENGINEERING BOOKLET WaS Written 

in April 1949 for the guests at the Sewaren Open House 
held during June of that year. At that time the first two 
units were in operation, the third was under construction, 
and the design work for the fourth unit was in progress. 
The booklet describes the first three units fully and pre- 
sents such information as is available and pertinent about 
the fourth unit. 




Fig. 1 Territory Served by the Electric System 
4 



General Statement... 



LJ PON COMPLETION of four units, Sewaren 
Generating Station will have an installed capacity of approxi- 
mately 450,000 k\v and will be the largest of the five major 
generating stations which ser\'e the Public Service electric 
system. Its location on the Arthur Kill, 3 miles above Perth 
Amboy, is north of the system's geographic center and south 
of its load center. 

The Public Service electric operating area extends diag- 
onally across the state in a long narrow band from the New 
York state line to 10 miles below Camden. In this prosperous 
strip, 112 miles in length by 7 to 21 miles in width and ap- 
proximately 1,500 square miles in area, reside 3-1/2 million 
people, four-fifths of the population of the state of New Jer- 
sey. There are 1,122,000 customer meters connected to the 
Company's lines. The 1948 system peak load was 1,168,000 
kw and the net output was nearly 5,600,000,000 kwhr. 

The major portion of the power produced is transmitted 
from the generating stations over a 132-kv transmission sys- 
tem which consists of a ring or loop surrounding the heavy 
industrial area in the northern part of the state with an exten- 
sion to Trenton and Camden in the south. From thirteen 
switching stations located on the 132-kv transmission, sub- 
transmission at 26 kv delivers energy to over 100 substations. 
The PubUc Service system is interconnected with neighbor- 
ing companies at voltages ranging from 26 kv to 220 kv so 
that it is a part of an interconnected electric system of five 
million kw of installed capacity. The map. Figure 1, shows 
the territory served, the transmission system, and intercon- 
nections. The highways and local roads in the vicinity of the 
station are shown in Figure 2. 

Sewaren Generating Station feeds the 132-kv transmis- 
sion and is also directly connected to the 26-kv subtransmis- 
sion which, before the construction of the new station, sup- 
plied the central area of Public Service territory from Bay- 
way and Metuchen Switching Stations. This central area has 



a load of 200,000 kw, and in effect receives all of its supply 
from Sewaren through 26-kv subtransmission and direct 
132-kv Unes from the station to Metuchen and Bayway. The 
remainder of Sewaren's capacity supplements the general 
system supply through the 132-kv transmission system. 

The need for a generating station in this growing indus- 
trial area has been apparent for many years, the 155-acre site 
having been purchased in 1928. The site occupies a portion 
of the flat salt marsh which borders the Arthur Kill and is 
shown on the map, Figure 3. Various studies of the methods 
to be used in developing this site, together with probable 
capital costs and operating economies, were made from time 
to time over a period of years. The essentials of the present 
layout were first developed during the latter part of 1944. 

On January 21, 1946, authorization was given for con- 
struction of a generating station at Sewaren consisting of two 
100,000-kw units to meet the system load as forecast for 1948. 
Continuing load growth resulted in authorization, on Janu- 
ary 9, 1947, of a third unit, dupUcating the second; and on 
December 11 of the same year, in order to obtain 1951 de- 
Uvery, funds were appropriated for the purchase of a fourth 
turbine-generator of 125,000-kw capacity. 

The basic objective in the design of the station was to 
take advantage of every technical advance in the art that was 
judged to be practicable and dependable in operation. EflB- 
cient operation is assured by throttle steam conditions of 
1,500 psi and 1,050 F, eight stages of feedwater heating in 
all units, and reheating to 1,000 F in the fourth unit. The 
simple, straightforward arrangement of the plant, which was 
accomplished in large measure by unit design, contributed to 
its relatively low first cost. One boiler serves one turbine- 
generator without cross connection to other units. Operating 
simphcity is achieved by central control of the units in pairs, 
shaft-end auxihary generators, and all-electric au.xiliary drives. 
Building volume and cost are reduced by semi-outdoor type 
boilers. Building maintenance costs are decreased by exten- 
sive use of tile for interior finish, ventilation under sfight air 
pressure for cleanliness, and by the simple functional archi- 
tecture. 

The appendix has a list of technical papers concerning 
the design of the station. 




Fig. 4 Simplified Sketch Showing Exposed Parts of Boilers 




LLa I 




Fig. 5 East and North Exposures of the Main Building 



STRUCTURAL FEATURES 



The Sewaren Generating Station property ex- 
tends about one-half mile along the Arthur Kill 
and back the same distance to CUff Road. The 
site is a salt marsh, the original surface of which 
was about 1 ft above mean high tide. The top 
stratum is of meadow mat and mud having a 
thickness of from 10 to 25 ft and is highly com- 
pressible under load. Below the mud stratum 
there is approximately 50 ft of sand in layers of 
various types and grain sizes, the thickest layer 
being of medium to coarse sand with some 
gravel. Bed rock is located approximately 70 ft 
below the original ground level. At the site of 
the switching station along CUff Road, a com- 
pact impervious clay is found. 

The area in front of the station was dredged 
to provide a 30-ft draft in front of the dock and 
20 ft of water at the intakes to the screenwells. 
The material removed, amounting to approxi- 
mately 400,000 cu yd, consisted largely of coarse 
sand with some gravel, and was pumped onto 
the land to provide 90 per cent of the fill re- 
quired for the property. Finished grade is about 
6 ft above mean high tide. 

Watei-front Structures 

The waterfront structures are of three types. 
At the easterly end of the property there is a 
rip-rap dike which extends for approximately 
450 ft. This dike rests on the sand and gravel 
stratum and varies in height from 20 to 35 ft. The 
exterior face of the dike is on a slope of approxi- 
mately 40 degrees to the horizontal. The dock, 
which is of the reUeving platform t)'pe, is lo- 
cated west of the dike. It is 400 ft long and 50 
ft wide, with the platform located at approxi- 
mately mean tide. A concrete face wall retains 
the fill between the platform level and finished 
grade. Stability of the dock is secured by batter 
piles and by a rip-rap dike below the platform 
level. West of the dock there is a steel sheet 
pile bulkhead approximately 350 ft long. This 
bulkhead is anchored to a continuous concrete 
deadman located approximatelv 50 ft back of 
the piling. Additional stability for this bulkhead 
is secured by placing rip-rap up to mean tide 
level on each side of it. 



Buildings 

The principal structure on the site is, of course, 
the power station building which includes boiler 
house, turbine room, and a three-story service 
building. The over-all dimensions of the build- 
ing, for three units, are approximately 230 ft by 
290 ft. The distinctive feature of the layout is 
the location of the boilers partly outside the 
building enclosure, as shown in the simpUfied 
sketch, Figure 4. This design not only reduces 
the duty of the ventilating system but also re- 
sults in a considerable saving in cost, due to a 
reduction in the area of exterior walls, floors, and 
roof required. General views of the main build- 
ing and adjacent structures are shown in the 
Frontispiece and Figure 5. The service wing pro- 
vides areas for shops, storerooms, locker and toi- 
let rooms, oflices, laboratory, and cafeteria. Other 
buildings on the site are the chemical mixing and 
transil oil house, screen houses, gate house, and 
the coal handHng structures. The chemical mix- 
ing and transil oil house encloses : ( a ) equipment 
for treating raw water for make-up, (b) pumps 
for feeding chemicals to the feedwater system 
and the boilers, (c) transil oil purification equip- 
ment, and (d) an electrical load center serving 
equipment in that vicinity. In connection with 
the switching station at the northerly end of the 
property, there is a two-story control house, ap- 
proximately 34 ft by 40 ft, which has a battery 
room and shop on the first floor and control room 
on the second floor. 

Foundations 

The structures and practically all the yard 
piping and conduit fines, except those in the 
switching station area, are supported on piles 
averaging 25 to 30 ft in length. Creosoted wood 
piles were used for the support of the gate house 
and some of the electrical equipment and piping. 
All other structures are supported on untreated 
wood piles which are cut off just above mean 
water, or below in the case of deep foundations. 
The weight of the power station building with 
its equipment is such that it was necessary to 
space the piles in some areas on 2 ft 9 in. cen- 
ters in each direction. As the switching station 



was located on firm ground, simple spread foot- 
ings were used in this part of the work. 

As part of the main building is located beyond 
the original shore Une, the foundation was con- 
structed behind a temporary steel sheet pile bulk- 
head, placed back of and anchored to the 
concrete deadman of the permanent bulkhead 
structure. The sheet piling was returned at both 
ends to a point well inside the shore line. The 
wood piles in the turbine room and boiler house 
areas are capped by a concrete mat varying in 
thickness from 3 to 5 ft, depending on the loads 
which were to be distributed to the piles. The 
columns are supported on piers constructed on 
top of the mat. 

Concrete having 5 bags of cement and 1 bag 
of fly ash was used for practically all work. This 
resulted in a concrete having a minimum strength 
of 3,500 psi at 28 days, with an average strength 
approximately 500 psi higher than this figure. 
The use of fly ash improved the workabihty of 
the concrete and also resulted in increased 
strength beyond the 28-day period. 



Architectural Treatment 

The architectural treatment of the main build- 
ing is simple, with strong horizontal lines result- 
ing from continuous rows of sash and glass block, 
Figure 6. The building is faced with WiUiams- 
grove gray brick and trimmed v^dth limestone. 
For the lower 13 ft the face brick is laid up in 
rusticated pattern. All of the window frames are 
aluminum, and the principal entrance doors are 
of stainless steel. This includes the large three- 
section vertical lift door giving access to the 
transformer repair bay of the building. The archi- 
tectural treatment of the main building is carried 
out in the other buildings on the site, in so far as 
their size and function permit. 

Interior and exterior observation balconies are 
provided at the permanent end of the main build- 
ing to permit visitors to view the turbine room 
and the yard and dock facihties. There is an ele- 
vator to take the guests from the entrance lobby 
to this gallery. 

The temporary end on the westerly side of 
the building is covered with corrugated transite 




Fig. 6 The Architectural Treatment of the Building Has Strong Horizontal Lines 



10 



sheets secured to steel girts. In order to tie in this 
end of the building architecturally with the rest 
of the structure, the continuous strip of glass 
block above the crane rail level in the turbine 
room is carried around its temporary end. 

Structural Frame 

The structural framework for all buildings is 
of steel without fireproofing. The bays in the 
main building are 40 ft long, permitting the 
boilers to be set in between two lines of columns. 
This length of bay results in some heavy fram- 
ing, but facihtates the arrangement of equipment 
and gives a sense of openness to the structvire. 
The turbine room roof is supported by arched 
girders instead of the usual open truss construc- 
tion. These girders are spaced on 40-ft centers 
but intermediate rafters have been introduced 
so that the purlin spans are only 20 ft. On the 
south side of the turbine room the moments at 
the ends of tlie arched girders are taken by the 
columns which are 3 ft deep above the crane 
girder, and 4 ft 6 in. deep below. On the north 
side the moments at the ends of the arched 
girders are taken by cross girders of the coal 
bunker, permitting the use of H-columns. The 
coal bunkers are made of steel plate, Uned with 
gimite and arranged with eight pockets serving 
each boiler. 

Floor and Roof Construction 

The floor construction consists, in general, of 
reinforced concrete slabs supported on steel 
beams. All of the exterior platforms around the 
boilers and some interior platforms are of grat- 
ing. The roofs of the main building, except the 
portion over boiler drums, and of the chemical 
treatment and transil oil house are precast con- 
crete, ribbed imits, 2 ft wide. Other roofs are 
poured reinforced concrete slabs. 

Interior Finish 

The interior finish of the various areas was se- 
lected so as to require a minimum of mainte- 
nance. All of the work areas are faced with glazed 
tile. In the boiler room, and in the shop and store- 
room areas of the service building, the walls are 
finished with a 5 in. by 12 in. salt-glazed tile, and 
in the tiirbine room with 8 in. by 16 in. gray 
ceramic-glazed tile. The oflBce areas have plas- 
tered walls with acoustical plaster on the ceiling. 
The test department and cafeteria also have 
ceilings of acoustical plaster. The floor finish in 
the principal operating areas of the main build- 



ing is red quarry tile; in other areas it is cement 
finish. The concrete floors in the ofiBce areas, test 
department, and cafeteria are covered with as- 
phalt tile. 

Particular attention has been given to the 
architectural treatment of the lobby. This room 
is finished with green glazed terra-cotta ashlar 
walls and a terrazzo floor. The vestibule doors 
and side fights are of stainless steel, and the stair 
railing and miscellaneous trim are of white 
bronze. On the wall facing the entrance is an 
edge-lighted mural map of Plexiglass, showing 
the portion of the State of New Jersey served by 
the electric system of the Company, with the 
generating stations, switching stations, substa- 
tions, and transmission fines designated by dis- 
tinctive symbols. Below the mural map are trans- 
parencies mounted in frames, illustrating serv- 
ices rendered by the Company. 

Circulating Water Facilities 

The two screen wells for the condenser cir- 
culating water are located in fine with the steel 
sheet pile bulkhead. They are of heavy rein- 
forced concrete construction. Each well serves 
two generating units, with two pump compart- 
ments for each unit. At the screen well for No. 1 
and 2 Units, the circulating pump motors are 
located within the house constructed over the 
well. At the screen well for No. 3 and 4 Units, 
the motors are outside the house. The circulat- 
ing water leaving the condensers flows through 
tunnels underneath the floor running to the main 
discharge canal located longitudinally under the 
service building. The tunnel of each unit can be 
shut off from the main canal by means of stop- 
logs, which are handled by a chain hoist through 
a concrete shaft extending up to the main floor 
level of the service building. Outside the build- 
ing the discharge canal is constructed of steel 
sheet pifing, braced with structural steel shapes 
located above mean water. 

Stacks 

Each boiler is served by a ground-supported 
radial brick stack 225 ft high. The stacks are 
fined vdth brick which is self-supporting for the 
lower 125 ft and is carried on corbels at 33-ft 
intervals above this fine. Airplane obstruction 
fights are located at the top of the stacks and 
are designed so that they can be lowered to 
the ground for relamping. 



11 




Fig. 7 Fuel Oil Tank 




Fig. 8 Coal Handling System 



Fuel Oil Tank 

The 125,000-bbl fuel oil tank, Figure 7, is lo- 
cated north of the main building. It is an all- 
welded steel tank, 134 ft in diameter and 50 ft 
high, with conical roof supported on steel fram- 
ing. The tank is supported on a wood pile foun- 
dation with the piles cut off at approximately 
mean tide, and capped with a concrete slab 18 in. 
thick. Approximately 6 ft of sand fill was placed 
on top of the mat to bring the bottom of the tank 
to the required elevation. Surrounding the tank 
is a sand dike 11 ft high. 

Coal Handling Structures 

The coal handling structures, shown in Figure 
8, consist of an unloading tower on the dock, a 
breaker house, and a swing boom tower. All of 
the buildings have steel frames and are covered 
with flat transite sheets secured to the frame with 
Nelson studs. Aluminum sash are used through- 
out. Attention was given to the arrangement of 
openings and other details of the buildings so 
that they harmonize architecturally with the 
other structures. The various partitions in the 
coal handhng structures are constructed of con- 



crete plank, supported by angle iron frames. 
Floors are of reinforce'd concrete. Coal arriving 
by rail or reclaimed from storage in the yard is 
dropped into track hoppers located in a pit ap- 
proximately 40 ft long and 25 ft deep. This pit is 
of heavy concrete construction in order to resist 
the buoyancy of the structure and the horizontal 
pressures from the surrounding mud and clay 
strata. The coal is carried between buildings on 
conveyors, which together with the adjacent 
walkways are carried on top of steel trusses. 

Yard 

In spite of the fact that the site is substantially 
level, drainage presents no serious problem on 
account of the sandy nature of the fill. In gen- 
eral, such drainage as is required is obtained by 
the use of dry wells. The transformer yard and 
other working areas are covered with crushed 
stone, and the parking area and roads are paved 
with bituminous material on a macadam founda- 
tion. A brick wall with wire mesh top separates 
the transformer yard from the entrance road- 
way. The area around the entrance to the power 
station building is landscaped. 




Fig. 9 The Lobby 



13 




Fig. 10 Main Operating Floor Plan 



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Fig. U Plan of Lower Operating Floor-No. 1 and 2 Units 
14 





MECHANICAL FEATURES 



Plant Layout 

The mechanical equipment is placed so that 
it is attended normally at two levels, elevation 
126 ft and 100 ft, as shown in the cross-sectional 
drawing. Figure 30. The arrangement of equip- 
ment at these two levels is shown in Figures 
10 and 11. 

Turbine-Generators 

The first tliree turbine-generators are single- 
shaft, tandem-compound, 3,600 rpm units with 
a nominal rating of 100,000 kw at throttle steam 
conditions of 1,500 psi and 1,050 F. A 7,500-kw 
auxiUary generator is connected to the outboard 
end of each generator. E.xcitation is provided by 
separate, slow-speed motor-generator sets. Fig- 
ure 12 is a view of No. 1 and 2 Units taken be- 
fore the installation of No. 3. No. 1 is a Westing- 
house machine having twenty-five stages in the 
high-pressure cylinder and seven stages in the 
double-flow low-pressure element, Figure 13. 
No. 2 and 3 are twin General Electric machines 
with eighteen stages in the high-pressure cylin- 
der and five stages in the triple-flow low-pres- 
sure element. Figure 14. In the Westinghouse 
turbine, the entering steam expands through a 



Curtis stage having 18-8 stainless steel nozzles 
before it touches the 2-14 per cent chromium— 
1 per cent molybdenum steel casing. The blades 
in this region of high temperature are made of a 
13 per cent chromium steel. At the high-pressure 
end of the General Electric machines, the inner 
shell is made of 17 per cent chromium— 14 per 
cent nickel— 2 per cent molybdenum steel, co- 
lumbium stabilized. The blades exposed to the 
highest temperature are made of. steel contain- 
ing 15 per cent chromium— 5 per cent cobalt— 3 
per cent tungsten— 0.15 per cent molybdenvun. 
Steam for feedwater heating is extracted from 
the high-pressure cylinder, at the cross-over, and 
from the low-pressure element, at a total of eight 
points. 

In normal operation, bearing lubricating oil is 
supphed b}' a centrifugal pump mounted on the 
turbine shaft. During starting and stopping, an 
auxihary a-c motor-driven pump supplements 
the shaft pump. If the auxiliary pump fails to 
maintain pressure an a-c motor-driven oil pump, 
normally used when the machine is running on 
the turning gear, starts automatically. If that 
fails similarly, the emergency oil pump, d-c mo- 
tor-driven from the station batteries, provides 
lubrication to bring the unit to a stop. 




Fig. 12 No. 1 and 2 Turbine-Generators 



15 




Fig. 13 Cross-Section— No. 1 Turbine 




Fig. 14 Cross-Section— No. 2 and 3 Turbines 




Fig. 15 Cross-Section— No. 4 Turbine 



No. 4 turbine-generator will be a 125,000-kw 
single-shaft, 3,600 rpm, tandem-compound ma- 
chine of Westinghouse make, with a shaft-end 
auxiliary generator and a separate exciter. Fig- 
ure 15. Steam conditions are 1,500 psi and 1,050 
F at the throttle with reheat to 1,000 F. This 
machine will ha\e a triple-flow low-pressure ele- 
ment. 

Condensers 

Roughlv two-thirds of the steam entering the 
turbine expands through all the stages and ex- 
hausts to the condenser. The other third is ex- 
tracted from the turbine and reaches the con- 
denser as drains from the feedwater heaters. 

The condensers are of the single-pass, surface 
type, Foster Wheeler make, with divided water 
boxes, arranged with bottom inlet and outlet 
water connections. The tubes are arranged par- 
allel to the turbine shaft in two banks, with a 
wide steam lane between them, as indicated bv 
the shape of the outlet water box. Figure 16. The 
welded steel shell is spring-supported and has 
an extension neck which is welded to the turbine 
exhaust connection. After the condensate and 
heater drains are deaerated within the shell, they 



flow to the storage hotwell resting on the floor 
below. The air-cooler sections are at the bottom 
of each tube bank within the shell. Each con- 
denser has two Kinney rotating vacuum pumps 
for the removal of noncondensible gases. They 
are also used to evacuate the steam space of the 
condenser when starting and to remove air re- 
leased from the circulating water at the top of 
the water boxes. 

The circulating water is chlorinated as it flows 
through trash racks and tra\eling screens to the 
circulating water pumps located in the screen 
house at water's edge. There are two motor- 
driven, vertical, mixed-flow pumps for each con- 
denser. The concrete pipes between pumps and 
condenser are arranged so that one pump can 
supply cooling water to the entire condenser. 
Cast iron plates for closing off the water spaces 
of the condenser during acid cleaning are stored 
in the water boxes. 

Feedwater System 

The feedwater heating cycle includes eight 
stages of heating and extensive use of condensate 
for cooling, as shown in the diagrams. Figures 
17 and 18. 




Fig. 16 Condenser 



17 



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780, OOP LB. PER HR. 



850,000 LB. PER HR. 
STEAM GENERATOR 



NO. 14 TO 18 HEATERS 

HAVE INTEGRAL DRAIN 

COOLERS 



' NO. 17 
HEATER 



TOTAL OUTPUT 101,490 KW. 
HEAT RATE 9,965 BTU. PER KWHR. 



TANDEM COMPOUND 
DOUBLE FLOW TURBINE 





MAIN GENERATOR 
95,400 KW 



Z^ 6,090 



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Fig. 17 Heat Balance Diagram— No. 1 Unit 



774,376 LB PER HR. 



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TOTAL OUTPUT 102,080 KW. 
HEAT RATE 9,830 BTU. PER KWHR. 



TANDEM COMPOUND 
TRIPLE FLOW TURBINE 



NO. 24 TO 28 HEATERS 

HAVE INTEGRAL DRAIN 

COOLERS 



.EVAPORATOR 
LB. 




MAIN GENERATOR 
95,955 KW 



^ 6,125 



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NO. 21 
DRAIN 
COOLER 



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Fig. 18 Heat Balance Diagram-No. 2 and 3 Units 
18 



Each unit has two vertical, re-entry type con- 
densate-booster pumps. The single-stage section 
of this pump removes condensate from the con- 
denser hotwell and sends it through various heat 
exchangers in which it picks up heat from the 
generators, turbine oil, hydrogen seal oil, the 
vacumn pumps serving the condenser and the 
hydrogen system, and from the oil, glands, hy- 
draulic couplings, and motors of the boiler feed 
pumps. In the summer, circulating water reduces 
the temperature of the condensate in the con- 
densate cooler. The condensate then enters the 
second section of the pump which discharges 
it through four low-pressure closed feedwater 
heaters to the boiler feed pumps. The first three 
of these heaters are located in the condenser 
neck, Figure 19. The other low-pressure heater 
and the four high-pressure heaters are installed 
vertically, with heads down, also in the turbine 
room so as to be accessible to the crane. The 
feed pumps discharge the water through the 
high-pressure heaters and economizer to the 
boiler drum. The heater drains are cascaded from 
heater to heater all the way to the condenser. 
The five vertical heaters are constructed with in- 
tegral drain cooler sections within the heater 
shell. 

The boiler feed pumps are motor-driven 
through variable-speed hydraulic coupUngs of 
the shding-scoop type, Figure 20. The pumps 
are of such capacity that one condensate-booster 




Fig. 19 Feedwater Heaters in Condenser Neck 

pump and two of the three boiler feed pumps 
are running at full load on the unit. 

The feedwater system of each unit includes a 
single-effect evaporator for make-up. Figure 21. 
It takes steam from the third bleed point of the 
turbine and discharges vapor to the next lower 
heater in the cycle. In addition to supplying 
make-up, the evaporators normally supply steam 




Fig. 20 Boiler Feed Pumps-No. 1 and 2 Units 
19 



for heating fuel oil and chemicals, and for heat- 
ing the building. Evaporator feedwater consists 
of city water treated in a Zeolite water softening 
system and heated in a steam-jet deaerator. Pro- 
vision is made to supply dissolved chemicals for 
feedwater treatment to the suction of the boiler 
feed pumps or to the boiler drums. 

Steam Generating Units 

Steam for the first three turbine-generators is 
suppHed by three identical Combustion Engi- 
neering-Superheater boilers, Figure 22. They 
are of the three-drum, radiant type, having a 
continuous rating of 850,000 lb per hr and a 
maximum of 950,000 lb per hr for four hours 
with throttle conditions of 1,500 psi and 1,050 F. 
The water-cooled, slag-tap furnaces have a vol- 
ume of 52,450 cu ft. They are arranged for tan- 
gential corner firing at two levels with combina- 
tion pulverized coal and oil burners vertically 
adjustable to permit positioning of the turbulent 
burning zone in order to obtain optimum slag- 
ging conditions on the walls and floor of the fur- 
nace and to effect a certain amount of superheat 
control. Final steam temperature is controlled by 
a damper which by-passes part of the furnace 
gases from the primary superheater to the econ- 
omizer. The location of the drums, downcomers, 
and superheater outlet header away from the 
furnace makes the boiler design particularly well 




Fic. 21 Evaporator and Evaporator Deaerator 



adapted to the semi-outdoor arrangement. The 
furnace expands upward and downward from 
supports located midway in the height of the 
furnace. 

The gas passages enclosing the primary super- 
heater and economizer are lined with sectionally 
supported firebrick. The outdoor roof portion of 
the welded steel casing is sloped and formed 
with gutters and rain leaders. About half of the 
heat radiating surface of the casing is outside of 
the building. A permanent, stationary acid clean- 
ing system, consisting of tanks, pumps, and pip- 
ing is arranged for cleaning the internal sur- 
faces of the boilers. 

In design, the fourth steam generating unit 
will be similar to the first three. It will have a 
larger furnace, a pendent reheater section, and 
an attemperator for control of throttle steam 
temperature. 

Draft Equipment 

All of the draft equipment is located out-of- 
doors near the ground level between the boiler 
and the stack. Two variable-speed forced draft 
fans supply combustion air to each boiler through 
the air heaters, Figure 23. The fans are connected 
to constant-speed driving motors through hy- 
draulic couplings with continuous pump control. 
The heat generated in the oil of the hydraulic 
coupUngs is transferred to the entering air by 
radiators mounted at the fan inlets. The fan 
bearings are cooled with air flow induced by a 
suction connection to the induced draft section 
of the air heater. 

Each boiler has two induced draft fans to re- 
move the combustion products from the boiler. 
Figure 24. Operation of the fans of the first unit 
is controlled by varying the speed with hydraulic 
couphngs. The hydraufic coupUng oil, in this 
case, is cooled in radiators equipped with motor- 
driven fans. The second and third unit fans oper- 
ate at constant speed and the gas flow is con- 
trolled by inlet louver dampers. Bearing cool- 
ing is similar to that used on the forced draft 
fans. 

Soot Blowers 

High-pressure air soot blowing is used to clean 
the boiler furnace, superheater, economizer, and 
air heaters. Automatic, sequential operation of 
the blowers is controlled and indicated in the 
control room. Compressed air is stored in an out- 
door receiver at 500 psi and reduced to 250 and 



20 



,11 II ' "1 1 'J. [I 



8 T M -T ^ 




SCALE I I I . i I .... I 



Fig. 22 Boiler Cross-Section 



320 psi for blower operation. Retractable units, 
operating at 250 psi, clean the furnace walls, the 
second stage of the superheater, and the air 
heaters. Puff type, revolving blowers clean the 
first stage of the superheater and the economizer 
with 320-psi air. 

As many of the soot blower heads are located 
out-of-doors, the power air, for controlling and 
moving the blowers, is dried by siUca gel before 
it enters the system. 

Dust Collecting System 

The flue dust collectors have two stages. The 
flue gas leaving the air heaters first passes 
through a mechanical section in which cyclones 
remove the larger particles by centrifugal force. 
The second section removes the smaller, fluffier 
matter by electrostatic precipitation. The elec- 
trostatic part of the equipment is divided into 
five longitudinal sections which can be closed off 
by curtain dampers for removing the collected 
dust from the electrodes by rapping. Redler con- 
veyors transport the dust from the hoppers to a 
dust pimip which sends it either to a storage silo 
in the breaker house of the coal handhng system 
where it is held for sale, or to the boiler ash 
hopper for transport to the ash disposal area. 
Dust from the odier hoppers of the steam gen- 



erating unit is transported by gravity or screw 
conveyor to the dust pump for similar disposal. 

Ash Disposal 

The boiler furnaces have slagging bottoms ar- 
ranged for continuous discharge. The molten 
slag flows to the slag spout and falls into the 
water of the ash hopper which accommodates 
about twelve hours' normal accumulation. The 
hopper is fitted with disintegrating nozzles and 
a propeller to minimize the formation of large 
lumps. At intervals the contents of the hopper 
are sluiced into the sump tank which has a cliiiker 
grinder in its upper section. The lower section is 
the suction chamber from which the ash pump 
sends the mixture of ground slag and water to 
the disposal area located to the west of the sta- 
tion, or to a dewatering bin in the breaker house 
from which it can be loaded into trucks or rail- 
road cars. 

Fuel Handling 

The coal handling system is designed primarily 
for water-borne coal. The general arrangement 
of the system is shown on the property map. Fig- 
ure 3. Barges or colliers are unloaded by the 
bucket hoist of the coal unloading tower from 
which a conveyor delivers the coal directly to 




Fig. 2.3 Forced Draft Fan 



the Bradford breaker in the breaker house where 
it is reduced to a nominal 3/4-in. size. From the 
breaker house it goes by conveyor either to the 
station bunker or to the swing boom tower for 
yard storage. The conveyor system has single 
belts throughout in view of the fact that the 
boilers can be transferred readily from coal to 
oil firing in case of a prolonged breakdown. The 
conveyors on the bridges between structures are 
sheltered from the weather by close-fitting, sec- 
tional, semi-circular, stainless steel hoods. Trac- 
tor-drawn carryalls transport the coal from the 
initial pile to yard storage or reclaim it to a 
hopper feeding a return conveyor to the breaker 
house. This hopper is also arranged to receive 
coal from raihoad cars. 

Each boiler has its ovm 1,800-ton bunker from 
which coal drops into four automatic weighing 
scales with hoppers which feed it to stainless 
steel coal pipes supplying the three pulverizer 
feeders. The coal piping is arranged so that each 
of the three pulverizer feeders receives coal from 
either of two scales. These coal pipes increase in 
diameter sUghtly from top to bottom in order to 
minimize clogging of wet coal. Vibrators are also 
provided for this purpose. The table-type feeders 
automatically supply coal as required to main- 
tain a constant level in the three Hardinge-type 
pulverizers, Figure 25. Three paddle-type ex- 
hausters remove pulverized coal and air from 
the mills and blow it to the twelve burners lo- 
cated at three different elevations in the four 
comers of the furnace. Each mill feeds four 
burners at the same elevation. 

A movable shuttle conveyor is provided to 
empty the bunker of a boiler in the event of a 
bunker fire or a prolonged outage. The conveyor 
takes the coal from the automatic scales of one 
boiler and deUvers it to the hoppers at the head 
of the coal pipes of an adjacent boiler. 

Fuel oil arrives at the dock in barges whose 
pumps deliver it to the 125,000 bbl storage tank. 
In addition to the two tank heaters, there are 
three pressure heaters and three screw pumps 
situated in the building to supply oil from the 
tank to the burners at the proper pressure and 
temperature. 

Automatic Control 

The units are designed to operate normally by 
automatic control under constant and varying 
load conditions. The turbine governing system is 
actuated hydraulically by oil pressure generated 



by a centrifugal pump on the turbine shaft. In 
general the other mechanical control systems are 
operated by compressed air at 90 psi pressure. 
The control air is compressed in several recipro- 
cating air compressors. In order to have the air 
free of oil the compressor pistons are fitted with 
carbon rings requiring no lubrication. Moisture 
is removed from the air by siUca gel before it 
enters the control air system. 

The combustion control system automatically 
and simultaneously accomplishes the following: 

( a ) Controls the combustion rate to maintain 
the desired steam pressure. 

(b) Controls the furnace draft, maintaining 
a negative pressure under normal operating con- 
ditions. 

(c) Controls the fuel-air ratio so as to give 
smokeless and stable operation over a four-to- 
one load range. 

A temperature controller automatically regu- 
lates the superheated steam temperature by po- 
sitioning the electrically operated superheater 
by-pass damper. Tilting of the top set of four 
burners is accompUshed electrically by remote, 
manual control from the control room; the lower 
sets are adjusted manually at the burners. 

Three-element feedwater control varies the 




Fig. 24 Induced Draft Fan and Dust Collector 



23 



speed of the hydraulic couplings driving the 
boiler feed pumps to keep the feedwater flow 
proportional to steam flow and to maintain the 
water level in the drum within limits. This con- 
trol operates the feed pumps in parallel without 
any special provision to ensure equal division 
of flow. 

Other control equipment maintains levels in 
feedwater heater and condenser hotwells; regu- 
lates the condensate temperature for adequate 
cooling of the generators, turbine oil, et cetera; 
controls the temperature and pressure of fuel 
oil going to the boilers; regulates the chlorina- 
tion of the condenser circulating water; and per- 
forms many other functions. 

Control Rooms 

Complete control of the four-unit station is 
centered in two control rooms, one for each pair 
of units. Each control room is situated at the cen- 
ter of the area occupied by the main equipment 
under its supervision. These control rooms are 
tee-shaped, with the electrical section, illustrated 
in Figure 26, forming the cross-bar of the tee. The 
two turbine-generators are visible through win- 
dows just above the bench board. The other sides 
of the room are occupied by the panels controll- 
ing the turbines, boilers, and their auxiliaries, 
Figure 27. At the rear, there are two windows 



looking toward the boilers. The control rooms 
are air conditioned and soundproofed. Special 
attention was given to the lighting, particularly 
of the vertical panels, for which totally indirect 
fluorescent lighting is provided by means of a 
cove and arched ceiling design. In the areas be- 
tween sections of arched ceiling, vinylite egg 
crate plastic was used to provide a luminous ceil- 
ing, which avoids the contrast between lighted 
and unlighted areas that a solid ceiling would 
have given. 

The electrical controls for the generators and 
circuit breakers are mounted in a mimic bus 
arrangement on the bench board. Electrical in- 
struments and meters are located on panels above 
the windows. All protective relays are mounted 
on adjustable frame racks in an isolated room 
directly above the control room. 

There is no distinct separation between boiler, 
turbine, and auxiHary boards in the mechanical 
sections of the rooms, the controls being placed 
on the panels in relative arrangement similar to 
that of the equipment controlled. The control 
boards are fitted with indicating and recording 
instruments, automatic and manual control de- 
vices, alarms, and push-buttons for starting and 
stopping the equipment. Some of the control de- 
vices and push-buttons are fitted in flow-fine dia- 




FiG. 25 Coal Pulverizer 



24 




Fig. 27 Control Room— Mechanical Section 



25 



grams to help the operator visualize the system. 

The indicating instruments in the control room 
give the operators a complete picture of the oper- 
ation of the plant. All important pressures, tem- 
peratures, flows, and valve and switch positions 
are continuously indicated on dials or with signal 
Ughts. There is a 160-point recorder which, at 
10-minute intervals, prints the temperature of 
all important bearings. Another similar instru- 
ment records superheater tube temperatures. A 
control room serving two units has more than 
300 instruments and a total of 827 measurements 
of flow, temperature, pressure, et cetera, are re- 
corded automatically. 

Remote indication is provided at the Load 
Dispatcher's OflBce in Newark to show the posi- 
tion of oil circuit breakers and disconnecting 
switches in the transformer yard and switching 
station. 

Ventilating and Heating 

Each unit has its own ventilating system which 
automatically controls the air temperature in the 
various parts of the main building. Filtered air 
is distributed to diff^erent locations and eleva- 
tions in accordance with the heat losses at these 
points. One system has an air washer which pro- 
vides evaporative cooling when the proper rela- 
tive humidity conditions prevail. All three sys- 
tems are arranged for partial recirculation and 
have heating coils to warm the air in cold 
weather. The service building is ventilated by 
a daytime system and a 24-hour system. Both of 
these use 100 per cent fresh air which is warmed 
by steam coils in cold weather. The systems are 
designed to operate with all windows closed and 
to maintain a sHght positive pressure to keep 
dust and dirt out of the buildings. 



CRMO 
1^ 



JOINT 



12-3/4'O.D. 

2"+thk:' 



-V 



18/8 



LENGTH- 18 
Fig. 28 Transition from Ferritic to Austenitic Steel 
Pipe at Turbine Stop Valves 

Piping Systems 

The piping systems of the plant are made up 
with the widest practicable use of welded joints. 



The only flanged joints exposed to 1,050 F steam 
are those in the steam admission pipes from the 
turbine control valves to the top half of the high- 
pressure turbine casing. In the high-pressure 
boiler feed piping there are no flanged Une joints. 
Valve bonnets in this system are of the pressure- 
seahng, breechblock design without a bolted 
closure. In the larger sizes, the piping systems 
carrying salt water are of cement-Uned steel, 
with welded joints. The 48 in. circulating water 
pipes are made of reinforced concrete. 

There are no valves between the boiler and 
the turbine stop valves in the main steam sys- 
tem. The pipe is made of 3 per cent chromium— 
1 per cent molybdenum alloy steel. The main 
run is 16-1/2 in. in outside diameter, forged and 
bored to 2-3/4 in. wall thickness. The turbine stop 
valves are made of stainless steel which expands 
about 50 per cent more than the ferritic steel of 
the pipe. The welded joint between the two was 
made in the shop by a new method known as the 
"Kelcaloy Process" developed by The M. W. 
Kellogg Company, illustrated in Figure 28. The 
purpose of this arrangement is to have the major 
portion of the interface between dissimilar metals 
longitudinal to the pipe rather than transverse, 
and therefore subject principally to shear stress 
as a result of internal pressure or bending forces. 

The piping and valving of the feedwater sys- 
tem have been simplified by locating the heaters 
in pairs, placing more heaters on the suction side 
of the boiler feed pump, and locating three of 
the low-pressure heaters in the condenser neck. 

Fire Protection 

The buildings are protected against fire hazard 
by a system of hoses and hydrants suppUed by a 
fire pump. Special water-fog systems protect the 
transformers, oilostatic tunnels, fuel oil and 
lubricating oil equipment, and the hydrogen de- 
training equipment of the main generators. 

The fire alarm system is of the positive non- 
interfering, coded, supervised type. It consists 
of manual pull-type boxes, automatic electric 
trip boxes, electrically operated horns, and a 
centraHzed control panel located in a relay room. 
The automatic boxes of a spring-prewound type 
are installed in conjunction with the electrical 
controls for the water-fog systems. This type of 
alarm system assures the receipt of four full 
rounds of signals from the first box operated. 
Subsequent operation of other alarm boxes can- 
not interfere with the signal. 



26 



ELECTRICAL FEATURES 



Generatots 

The ratings of the first three main generators 
are: 

No. 1 No. 2 and 3 

Nominal Rating 95,000 lew 95,000 kw 

111,765 kva 111,765 kva 

Power Factor 0.85 0.85 

Hydrogen Pressure 15 psi 15 psi 

Maximum Rating 121,176 kva 117,647 kva 

Hydrogen Pressure 30 psi 25 psi 

The above ratings are at 13.8 kv. The fourth 
main generator will have a rating of 140,000 kva 
at 16.5 kv. With this higher operating voltage, 
the current will be about the same as that of the 
other three with the result that the main leads 
and other current carrying parts associated with 
all generators will be identical. 



The stator winding of each generator is a 
single circuit with both ends of the phase wind- 
ings brought outside of the housing through 
bushing terminals. All turbine-generator units 
have directly connected 7,500-kw auxiUary gen- 
erators. The main generators are hydrogen-cooled 
and the auxiliary generators are air-cooled in 
closed systems having surface-type coolers with 
condensate as the coolant. 

The main one-line diagram of the station is 
shown in Figure 29. Each generator has its own 
neutral ground connection through an Askarel- 
filled distribution transformer. This unit is in- 
sulated for 37.5 kv and has a 12-kv primary and 
120/240-v secondary. The low-voltage winding 
is short-circuited through a 0.396-ohm stainless 
steel resistor, giving 8.5-amp primary fault cur- 
rent for a ground on the 13.8-kv system. 









......^^ 



®. 



n 



MMA Nm /WM 

.. vww 



T ps 









y 



s- 



(\.^:( 



■j^ 






ELECTRICAL EQUIPMENT 



.^-1^^ 



(5^ 
(5^ 






® 
® 
® 
® 



lift fpf i r® %-z 



' (29KV CLASS) 



(e3KV CLASS) 



®l«00»»» onco»»t 


et 


®,.oo.« oa c.c 


IT BKCAKCII 


©.00..-.L,.C...<.U 


NO OlSeONMCCT 



L i it i 

®}, ®}f ®}, M 



Fig. 29 Main One Line Diagram— Electrical 



27 



f— 1 




BOILER HOUSE 



Fig. 30 Plj 




. 2IS-0 



T~r^ 



: ^----"--- 



150 TON CRANE 




3tn 



TURBINE-GENERATOR 



— ^^To^r^ _,^ ^ GENERATOR 



n "^ 




TURBINE ROOM 



Cross-Section 




Main Generator Disconnecting Switch 
and Potheads 




Fig. 32 Oilostatic Cable Showing Junction of 
Copper and Steel Pipes 



The generator is protected against phase-to- 
phase faults by a three-phase, high-speed, differ- 
ential relay connected to current transformers in 
the neutral leads and in the phase leads of each 
generator winding. 

For phase-to-phase faults on bus and oilostatic 
cables between the generator and the oil circuit 
breakers, three multi-restraint differential relays 
are used, one for each phase, connected between 
current transformers in the generator leads and 
bushing-type current transformers in the oil cir- 
cuit breakers. 

A high-speed overcurrent ground relay with a 
back-up high-speed overcurrent relay connected 
to a current transfomier in the secondary circuit 
of the neutral grounding transformer trips the 
generator for a ground fault anywhere on the 13- 
kv system. 

To distinguish between ground faults on the 
13-kv side of the high-tension power transform- 
ers and ground faults in the generator or 13-kv 
bus, an induction type voltage relay is used, con- 
nected across a 25-ohm resistor in one comer of 
the delta of a wye-delta potential transformer 
which in turn is connected to the 13-kv leads be- 
tween the oil circuit breaker and the power 
transformer. The voltage relay allows time for 
the generator neutral ground relays to trip the 
13-kv breakers, after which it closes its contacts 
and rings an alarm. In addition to ringing an 
alarm, the voltage relay can trip the remote end 
of a high-tension Une. 

Out-of-step protection on the Westinghouse 
generator is accomplished by the use of two in- 
stantaneous under-voltage relays; the first, oper- 
ating on 85 per cent of normal generator voltage, 
reduces the steam flow to a point corresponding 
to 75 per cent of full load, while the second re- 
lay, operating on 50 per cent of normal generator 
voltage, reduces the steam flow to that corre- 
sponding to 50 per cent of full load. On the Gen- 
eral Electric generators, the out-of-step relay 
reduces steam flow to a point corresponding to 
75 per cent of full load. 

Phase-leads from the generators are connected 
by means of flexible copper braids to buses con- 
sisting of four 1/2-in. by 5-in. copper bars individ- 
ually insulated by micarta sleeving and mounted 
on 23-kv porcelain supports. Phase-isolation is 
maintained by either a masonry structure or 
transite barriers from the point where the con- 
nections are made at the machine terminals to 



30 



the oilostatic potheads. Forced air ventilation is 
used on main lead enclosures. 

The indoor 5,000-amp gang-operated discon- 
necting switches, Figure 31, are mounted in a 
concrete-brick cell structure directly below the 
generators. These switches have high-pressure 
clamp-t)^e contacts on both the hinge and jaw 
ends of the blades. 

Oilostatic Cables 

The generator leads are run as oilostatic cable 
installed in tunnels from the turbine room to the 
transformer yard, a distance of approximately 
525 ft. Figure 32 shows a typical oilostatic tun- 
nel. The conductors of each circuit are carried 
in four 8-in. OD by 1 4-in. wall, steel pipes, each 
having six 750,000-cir mil copper cables. The 
transition from single-phase bus structure to 
three-phase oilostatic cable is accomplished by 
means of twelve 5-in. OD copper pipes, each 
enclosing two parallel conductors which orig- 
inate in one of the four potheads per phase. On 



the outdoor end of the run a three-phase pot- 
head is mounted directly on the steel pipe. Each 
pipe is insulated from its supporting hanger and 
a positive ground connection is installed at the 
indoor end in order to eliminate any circulating 
currents in the steel. The pipes are all anchored 
in the center so that expansion takes place at 
both ends. The temperatiu-es of the steel pipes 
are recorded periodically on charts in the control 
room. The outdoor potheads are shown in Fig- 
mre 33. The oilostatic cable is operated at 100-psi 
oil pressure. The pumps, control cabinet, and oil- 
storage tank are located in the chemical mixing 
and transil oil house. 

The tunnel foundations for the oilostatic 
cables are also used to support the large duct- 
banks of control cables running between the 
control rooms and the transformer yard as well 
as the 2,400-v secondary leads from the station 
auxihary power transformers to the indoor sub- 
station. The control cables and leads of one gen- 
erator are isolated from those of the other units. 




^Mi.lL 



Fig. 33 Oilostatic Cable Three Conductor Potheads 



31 



m-^ 






^j-r— ^ 



-1-^ 



13-26 KV TRANSF 



/ // 



/// 



= \.<- 



^_^IB=^': 






C: 



I ! 



• t»^ — — >»— — --^• { •■ ' ■^'TTt: — • — *~^ • 



13-132 KV TRANSF 



IS-I3S KV TRANSF 



;/ 



1-- 



I I , 

I 



— 1-+ -I — 



^.^ ^- 16.6-132 KV TRANSF 



^/- .'^'.^'',' 



^^ 



Fic. 34 Transformer Yard— Plan of Buses 



The tunnels for No. 2 and 3 generators are on 
a common foundation, with a barrier separating 
the cables of each machine. No. 1 oilostatic tun- 
nel is under the transformer track and uses the 
track foundations as walls. Placing the oilostatic 
cables in tunnels made it possible to use forced 
cooUng which resulted in cutting the copper 
cross-section to one half that required for a nor- 
mal buried installation. In No. 1 and 3 tunnels 
this cooling is accomplished by drawing air in 
at both ends and exhausting at the center of 
each tunnel by means of a 22,500-cfm fan. The 
oil for No. 2 oilostatic cable is circulated through 
an oil-to-water heat exchanger. Forced cooling 
is necessary only during the summer months 
when the oil, temperature reaches 64 C, corre- 
sponding to 82-C copper temperature. 

Transformer Yard 

An o\'erhead bus connects the oilostatic pot- 
heads to the mid-point of the duplex reactors 
which are housed in a masonry structure. From 
the two end terminals of each reactor, the out- 
put is fed in two directions. In the case of gen- 
erators No. 1 and 2, one feed is through an 
85,000 kva, three-phase, 13-I32-kv transformer 



to the 132-kv system and the other, through two 
51,000-kva, three-phase, 13-26-kv transformers to 
Sewaren Switching Station. On generator No. 3, 
both feeds are through similar 85,000-kva trans- 
formers to the 132-kv system. The terminal 
equipment on No. 4 generator will be similar to 
No. 3 except for generator voltage and the size 
of the transformers. 

All generator oil circuit breakers are solenoid- 
operated, 4,000-amp, 15-kv class, with 23-kv in- 
sulation and have an interrupting rating of 
1,500,000 kva. The 13-kv bus is supported 
throughout on 23-kv post-type insulators. Fig- 
ures 34 and 35 show a bus-plan and section of 
the transformer yard. 

All main transformers are three-phase units 
and there are no spares. The transformers are ar- 
ranged for forced coohng in order to make avail- 
able a large percentage of generator output dur- 
ing outages of the other transformer of the unit. 

Forced air cooling of the transformers is ac- 
complished by banks of portable fans set on the 
ground surrounding the units. The transformers 
are protected by oil pressure relays and differ- 
ential relays operated by bushing-type current 




SECTIOW -TRAMSFORMCK T«»D-NO 3 UNIT 



132 KV LIKES 



t« KV TII«MSf ORMEm AWD LIHtg 

Fic. 35 Transformer Yard— Cross-Sections 



33 




Fic. 37 Transformer Yard— A-Frame and 132-Kv Aluminum Bus 



34 



transformers located in the oil circuit breakers 
and transformers. 

Both types of transformers move on caster-type 
trucks so that transfer cars and turntables are 
unnecessary. Fire walls are used where necessary 
to obtain separation from adjacent transformers 
and equipment. Water-spray fire fighting sys- 
tems are provided on all transformer units as 
well as in the oilostatic tunnels. 

As previously mentioned, generators No. 1 
and 2 feed through the 13-26-kv transformers di- 
rectly to the 26-kv buses at Sewaren Switching 
Station, which is about 1,800 ft from the trans- 
former yard. The four 1,033,500-cir mil ACSR 
circuits are supported on the same steel towers 
as the 132-kv lines. One 26-kv circuit from each 
generator has a tap to supply the station auxiliary 
power transformers. Pilot-wire relay protection, 
including the transformer differential, has been 
provided for these Unes. 

The 13- 132-kv transformers of the first two 
generators feed a ground-supported 132-kv bus, 



sectionahzed by an oil circuit breaker. One 
132-kv line position is located on each section. 
The third and fourth 132-kv Unes, on isolated bus 
sections, are each connected to two transformers, 
one fed by generator No. 3 and the other by No. 
4. The yard layout provides space for a continu- 
ous main bus, a 132-kv transfer bus, a bus tie oil 
circuit breaker, and transformer and Hne oil cir- 
cuit breakers, should such equipment be required 
in the future. 

The 132-kv lines are protected by carrier cur- 
rent phase-directional-distance and ground-di- 
rectional relays. In the event of transformer 
failure on the first two lines, the remote ends 
will be cleared by telephone pilot-wire relays. 
Audio-modulated carrier is used for this purpose 
on the other two lines. Reserve directional-dis- 
tance and directional relays are available on each 
hne in the event of carrier failure. 

The main generator 13-kv leads from the ma- 
chine terminals to the reactor mid-tap are de- 
signed for 5,000 amp. The bus from the reactor 






Fig. 38 35,000-Kva, 13-132-Kv Transformer, Forced Air, Forced Oil Cooled 
35 



end terminals to the low-voltage bushings on the 
13-132-kv transformers and to a "Y" point on 
the feed to the 13-26-kv transformers is designed 
for 4,000 amp. From that same "Y" point to the 
low-voltage bushings on the 13-26-kv transform- 
ers the bus will carrv 3,000 amp. All sections are 
aluminum and designed to withstand a short- 
circuit current of 66,000 amp. The 5,000-amp 
bus consists of two 6-in. by 4-in. by 7/16-in. an- 
gles clamped to form a square with the 6-in. 
leg horizontal. The 4,000-amp section is a 6-in. 
by 6-in. by 3/8-in. square tube and the 3,000-amp 
bus a 5-in. by 5-in. by 3/8-in. square tube. Since 
maximum conductivitv is desired, pure aluminum 
having a conducti\ itv of appro.ximately 58 per 
cent that of copper is used. The arrangement of 
the 13-kv aluminum bus is seen in Figure 36. 

All connections on the aluminum bus itself 
are welded by the shielded, inert-gas process of 
a-c welding. Splice plates are used on all joints 



to give better current distribution as it is assumed 
that all current is carried through the weld and 
not across adjacent contact surfaces from which 
it is impossible to remove the aluminum oxide. 

The 132-kv bus. Figure 37, is of entirely dif- 
ferent construction as it carries only 1,200 amp 
but must span 33 ft between bus supports. A 4- 
in. OD aluminum tube with 1/8-in. wall is used. 
The end connections are butt welded and are 
made with an inside reinforcing sleeve approxi- 
matelv 12 in. long. All taps to this bus are above 
and at right angles to the main run with an "A" 
type connection having two legs of 1-1/4-in. IPS 
aluminum at 15 degrees to the vertical. The sin- 
gle top connector and the two bottom connectors 
are made of cast aluminum and are welded to the 
tubing. 

At all joints in which an aluminum fitting is 
bolted to a copper temiinal pad, a copper plate 
is sweated to the face of the aluminum connector 




Fig. 40 2,400-V Isolated Phase Bus Structure for Au.\iliary Power System 



37 




Fig. 41 Typical 2,400-V Metal-Clad Switchgear 

SO that all moisture is excluded in the joint be- 
tween dissimilar metals. For the same reason, 
aluminum plates were fastened to copper pads. 
Compression-type terminal lugs are used on all 
ACSR cable connections; 795,000 cir mils on all 
132-kv leads and 1,033,500 cir mils on all 26-kv 
leads. 

Auxiliary Power System 

The auxiliary power one-b'ne diagram is shown 
in Figure 39. The normal supply for the auxiUary 
power system of each unit comes from the 2,400-v 
shaft-end auxiliary generator of that unit. As 
back-up and also for starting, an auxihary power 
transformer bank of 8,000-kva capacity is used 
to feed the same 2,400-v group buses. Excitation 
of both the main and auxihary generators is pro- 
vided by a motor-generator set having separate 
d-c generators for the two fields and a flywheel 
to increase its inertia. 

The 2,400-v leads of the auxihary generator, 
Figure 40, are of isolated-phase metal-enclosed 
type. The three group buses of each unit are lo- 
cated immediately in front of the generator, 



which results in comparatively short leads. Since 
the 2,400-v auxihary load is heavily concentrated 
in this area, the feeders are also relatively short. 
A typical 2,400-v metal-clad switchgear installa- 
tion is shown in Figure 41. 

The auxihar}' power transformers are located 
in the transformer yard between the stack and 
the 132-kv transformers of No. 1 unit. Each of 
these power transformer banks is fed from a tap 
to one of the 26-kv hues to Sewaren Switching 
Station. This feeder has a disconnecting switch, 
current-hmiting reactor, and oil circuit breaker 
at this A-frame and is run in an underground 
lead-covered cable to the transformer location. 
The secondary leads of the transformers, of 
which there are three per phase, are 1,500,000- 
cir mil copper cable, with 5-kv insulation of an 
oil-base compound and chloroprene sheath. 
These cables run from the transformers to the 
auxiliary substation in transite ducts in a con- 
crete envelope forming the barrier wall between 
No. 2 and 3 oilostatic tunnels. 

In order to make it impossible to parallel the 
transformer and the auxihary generator, the cir- 
cuit breakers are cross-interlocked by auxihary 
switches so that one breaker cannot be closed 
unless the other is open. Automatic relays are 
installed to throw-over from the generator to the 
transformer, in the event of a loss of generator 
voltage. The automatic throw-over is initiated by 
an under-voltage relay connected to potential 
transformers on the auxihary generator leads. 
Other potential relays connected to the bus-po- 
tential transformers delay the transfer from gen- 
erator to the transformer until the bus voltage 
has dropped to approximately 500 v. Thus at the 
instant when the transformer is connected and 
the motors are again energized, there is no dan- 
ger of overstressing the motors even though the 
decaying generator voltage and the transformer 
voltage may be 180 degrees out of phase. Man- 
ual throw-over in the other direction is provided 
for transferring auxiharies from transformer to 
generator as when starting up. An outside source 
of power to these buses is always available either 
through the 132-kv or the 26-kv system. In both 
throw-overs the period of interruption to the 
auxiharies is 85 cycles. 

Power is stepped down from the 2,400-v buses 
and fed to 440-v metal-clad buses by means of 
transformers located adjacent to the screen houses 
and the coal handling structures. The installa- 
tions at the screen houses consist of one 1,500-kva 



38 



and two 500-k\a transformers for each unit, 
Figure 42. For the smaller motors and hghting, 
220 127-v supply is provided by twenty-one 
metal-clad load center units located throughout 
the station buildings. These lo^d center units are 
equipped with three-phase air-cooled transform- 
ers rated from 100 to 300 kva, stepping down 
from 440-v to 220 127-v, Figure 43. Metal-clad 
switchgear with draw-out type air circuit break- 
ers is used for all 2,400-v, 440-v, and 220-v auxil- 
iary buses. 

Totally enclosed motors are used to the great- 
est extent practicable, the more important ones 
being the drives for the draft fans and the cir- 
culating pumps of No. 3 and 4 units, which are 
out-of-doors, and for the coal handHng system 
and boiler feed pumps. All motors, including the 
2,000-hp boiler feed pump motors, start across 
the Une. SiHcone insulation is used on the 1,250-hp 
induced draft fan motors in order to keep the 
physical size to a minimum. 



Generally speaking, motors above 200 hp are 
supplied at 2,400 v, those between 25 hp and 
200 hp at 440 v, while those below 25 hp are 
fed at 220 v. 

Cable Arrangement 

Wherever possible, cables for control and mis- 
cellaneous 220-v supply are carried in cable trays 
rather than in conduit. Armored cables are used 
for this purpose, and the trays are made of gal- 
vanized expanded metal with angle-iron sides. 

A network of trays below the turbine room 
floor, connecting with a tray system under the 
control room and cable riser shafts, provides a 
flexible arrangement which permits cables to be 
routed to widely scattered points in the station. 
Stub trays or short conduits permit points not 
directly on the system to be reached. 

Control of the auxiliary substations located 
approximately 100 ft from the control room is 
carried in lead cable in a duct bank through the 
basement, and then distributed by means of 




Fig. 42 2,400— 400-V Auxiliary Power Transformers 
39 




Fic. 43 Typical 220-V Load Center 



cable trays to the various bus group risers where 
conversion to armored cable is made. From this 
point, the cables are carried to and drop into the 
top of the metal-clad auxiUary power cubicles 
through slotted trays. 

In the building, single conductor neoprene- 
jacketed rubber-insulated power cables in iron 
conduits are used for service above 220 v. Con- 
trol cables which must be run in iron conduits 
are rubber-insulated, lead-covered. In isolated 
cases, single phase, 2,400-v and 400-v power 
cables are carried in aluminum conduit. 

The control cables running to the transformer 
yard are carried in one large bank of transite 
conduits enclosed in a concrete envelope. In 
this system, all cable is lead-jacketed and rub- 
ber-insulated. 

D-C System 

The d-c system consists of two separate and 
independent sections, each complete with its 
own battery, charging equipment, and distribu- 



tion center. The charging equipment has a trickle- 
charger which continuously floats across the bat- 
tery, and a motor-generator set for rapid re- 
charging. The two sections are : ( 1 ) the control 
section for circuit breaker operation, (2) the 
valve section for valve operation and emergency 
hghting. All control and switching faciUties are 
dead-front, metal-enclosed equipment with the 
exception of the double-throw switches, which 
have been kept to a minimum. The d-c circuit 
breakers, switches, and rheostats are controlled 
locally. Ground detectors, battery ammeters, volt- 
meters, rheostat control, and alarms are located 
in the control rooms. 

Grounding 

The station ground consists of a grid over the 
entire area of the building and transformer yard, 
with connections to 500,000-cir mil copper cable 
driven into the ground with approximately 300 
wooden piles. Within the building, the grid is 
made up of copper bus bar in the basement, 
while in the yard 500,000-cir mil and 1,000,000- 



40 



cir mil copper cable is buried. All connections are 
made above ground with clamp-type bolted cop- 
per connectors. 

Interlocks 

Interlocking, both direct and selective, is used 
to prevent erroneous manipulation, to fix the se- 
quence of operation, and to protect operators 
and apparatus against accident. Equipment is in- 
stalled for interlocking between the indoor and 
outdoor apparatus at the generating station, but 
no attempt has been made to interlock between 
equipment in the generating station and the 
switching station. All interlocks are mechanical 
with the exception of the interlock on the ground 
blade of the 132-kv hne disconnecting switches, 
which is electrically operated. 

Lighting 

The turbine room has a combination of in- 
candescent and fluorescent lighting units ar- 
ranged along the under side of the roof girders. 
This produces equal lumens of each kind of 
light, developing about 30 foot-candles of illu- 
mination at operating floor level and a general 
diffusion of soft Hght throughout the room. Each 
high-intensity filament unit is equipped with a 
shielding lens, and the brightness ratios between 



sources and surroundings are low enough to pro- 
vide good visual conditions. 

In each control room, fluorescent light is di- 
rected by parabolic ceiUngs of acoustic plaster 
to the vertical surfaces of instruments and gages. 
An intensity of 40 foot-candles is obtained on 
the lower panel sections. Part of this illumina- 
tion is direct light from the lamps through diffus- 
ing Incite shields which are lighted to a bright- 
ness matching the ceiling background. Part of 
the light from the same tubes, together with that 
from supplementary lamps, is directed through 
plastic egg crate louvers to produce an intensitv 
of 50 foot-candles at desk level. Non-glare, etched 
glass is used in the gages and instruments and in 
the windows to minimize reflections from these 
surfaces. 

Public Address Systems 

To promote quick action and coordination in 
all phases of operation, there is a public address 
system for each generating unit. Loudspeakers 
are grouped on separate circuits to cover nine 
different operating areas associated with the 
boiler, the turbine, and all auxiliaries. Control 
of the loudspeakers is centraHzed at a master 
station located on a desk in the control room. 



.f^t". 






««*5>fe- 



AAl* 



-'^^vs&sp^zz: ..,_. 



im.. 



Fig. 44 2C)-kv bwitchins: Station 



Selector switches at the master station permit 
the control room operator to address any area 
separately, or any combination of areas simul- 
taneously. 

Switching Station 

Sewaren Switching Station is located on CUff 
Road northwest of the station approach road, as 
shown on the property map. Figure 3. A photo- 
graph of the entire switching station with the 
control house at the right is shown in Figure 44. 

The switch yard consists of two separate 26-kv 
buses each fed by two lines directly from the 
13-26-kv transformers at the generating station. 
To minimize the communication of trouble and 
for the maximum safety of maintenance, these 
buses are supported on completely independent 
structures and the equipment for each feeder 
has its own structure with ample horizontal 
spacing. Each bus will accommodate ten feeder 
positions and may be sectionahzed into three 
sections by disconnecting switches. The initial 
installation includes three feeder equipments 
and a station power feeder on the south bus and 



four feeder equipments and a station power 
feeder on the north bus. 

Each incoming 26-kv transmission line has 
three single-pole, double-throw, stick-operated, 
600-amp switches which permit the line to be 
connected to a test and ground position as well 
as the normal operating position on the bus. The 
bus disconnects are 1,200-amp, three-phase, gang 
operated and the oil circuit breakers are rated 
at 1,200 amp and 34.5 kv with an interrupting 
capacity of 1,500,000 kva. The breaker mechan- 
isms are d-c solenoid-operated. 

Each station hght and power transformer is 
connected to the 26-kv bus through a set of 
14-ohm resistors and 15-amp fuses on the load 
side of the gang-operated bus disconnecting 
switches. These transformer banks consist of 
three 75-kva oil filled units. 

All control, Ughting, and miscellaneous power 
circuits in the yard are rubber-insulated, neo- 
prene-jacketed cables buried in the ground with- 
out the use of conduit. The outdoor bus is copper 
tubing with clamp-type bolted connectors. 





aa:Sffi.JI>^.i: 



42 



APPENDIX 

Engineering Data 



Sewaren Generating Station 

Engineering Data for the First Three Units 
GENERAL 

Location Sewaren, New Jersey 

Product Electric Energy 

Designers Electric Engineering Department 

Public Service Electric and Gas Co. 
Architectural Consultants Walker & Poor 

Foundation Consultants Moran, Proctor, Freeman & Mueser 

Builders United Engineers & Constructors Inc. 

Important Starting Dates: 

Design January 1946 

Purchases: 

Turbine-Generators March 1946 

Boilers May 1946 

Erection in Field : 

Excavation January 1947 

Pile Driving March 1947 

Concrete May 1947 

Structural Steel July 1947 

Boilers 

No. 1 October 1947 

No. 2 November 1947 

Turbine-Generators 

No. 1 May 1948 

No. 2 June 1948 

Commercial Operation: 

No. 1 December 1, 1948 

No. 2 November 30, 1948 

Technical Papers about Sewaren: 

Cyclic Heating Test of Main Steam Piping Joints Between Ferritic and Austenitic Steels, 
Sewaren Generating Station, by H. Weisberg. A.S.M.E. Paper No. 48-A-87 presented at the 
1948 Annual Meeting. 

Welded Aluminum Bus in Outdoor Transformer Yard of Sewaren Generating Station, 
by D. M. Quick. Edison Electric Institute Bulletin, December 1948. 

The Design of Sewaren Generating Station and No. 1 Unit at Essex Station, Public Service 
Electric and Gas Company, by F. P. Fairchild. A.S.M.E. paper prepared for 1949 Semi- 
Annual Meeting, June 27-30, 1949. 



Principal Structural Materials for the First Three Units 



Dredging, 400,000 cu yd sand and gravel 

The Arundel Corp. 

Dock, Bulkhead, and Dike, 1,200 ft long 

J. Rich Steers, Inc. 

Structural Steel 

Main building, 4,200 tons Lehigh Structural Steel Co. 

Transformer yard, 350 tons Lehigh Structural Steel Co. 
B. Katchen Iron Works, Inc. 

Turbine-generator supports, 1,022 tons 

American Bridge Co., Inc. 

Coal handling structures, 1,020 tons 

Morris, Wheeler & Co., Inc. 

Coal bunker, 380 tons Cormery Construction Co. 

Grating 50,000 sq ft 

Blaw-Knox Division of Blaw-Knox Co. 
10,000 sq ft Kerrigan Iron Works, Inc. 

Pipe Railings, 11,000 lin ft 

Vulcan Rail & Construction Co. 

Duct Work, 525 tons Connery Construction Co. 

3 Brick Stacks, 225 ft high. Inside diameter 12 ft 3 in. 
at top, 15 ft at breeching. Outside diameter 15 ft at 
top, 24 ft at base M. W. Kellogg Co. 



Fuel Oil Tank, 125,000 bbl capacity, 420 tons of steel 

Bethlehem Steel Co. 

Face Brick, 1,000 M The Belden-Stark Brick Corp. 

Salt Glazed Tile, 5 in. by 12 in., 73,000 sq ft 

Tomkins Bros. 

Ceramic Glazed Tile, 8 in. by 16 in., 40,000 sq ft 

National Fireproofing Corp. 

Ceramic Tile for washrooms and toilets, 4,600 sq ft 

Alvin A. Lusardi 



Aluminum Sash, 7,500 sq ft J. S. Thorn Co. 

Glass Block, Owens-Illinois, 4,500 sq ft 

Royal Glass Works 

Limestone, 3,500 cu ft Ingalls Stone Co. 

Plastering, 3,200 sq yd; soundproof ceilings, 

800 sq yd Newark & Essex Plaster Contracting Co. 

Hollow Metal Doors, 267 doors 

Williamsburg Steel Products Co. 

Hardware, 267 doors New Jersey Hardware Co. 

Roofing, 68,000 sq ft M. H. Donovan & Co. 

Precast Roof Slabs, 53,000 sq ft 

Porete Manufacturing Co. 

Asphalt Tile, 9,000 sq ft Harry Rich & Co. 

Quarry Tile, 66,000 sq ft 

Material A. Tozzini TUe Works, Ina 

Installation Del Turco Bros., Inc. 

Ornamental Metal Work— stainless steel sash, 
stainless steel entrance doors, bronze work, 
ornamental railing Allied Bronze Co. 

Transite Siding, temporary end, 21,000 sq ft; coal 
handling 40,000 sq ft M. H. Donovan & Co. 

Vertical Lift Door, stainless steel, 24 ft by 35 ft 
clear opening The Peelle Co. 

Fence, 5,000 ft 

Cyclone Fence Div. of American Steel & Wire Co. 

Paving, 12,000 sq yd Marsellis-Wamer Corp. 

Landscaping Henry Kitsz & Sons 

Wood Piles-16,200 

Concrete used in foundations— 33,700 cu yd 
floors, roof, etc.— 7,200 cu yd 



46 



Mechanical Equipment for the First Three Units 

Turbine-Generators 

Unit No. 1 Units No. 2 and 3 

Manufacturer Westinghouse General Electric 

Turbines 

Nominal rating 100,000 lew 100,000 kw 

Maximum capacity 110,000 kw 110,000 kw 

Steam pressure 1,500 psi 1,500 psi 

Steam temperature 1,050 F 1,050 F 

Exhaust pressure 1.5 in. Hg abs 1.5in. Hgabs 

Speed 3,600 rpm 3,600 rpm 

Type Tandem-compoimd, double-flow Tandem-compound, triple-flow 

Stages: 

High-pressure cylinder 25 18 

Low-pressure cylinder 7 5 

Total 32 23 

Extraction points: 

High-pressure cylinder 3 4 

Crossover 1 1 

Low-pressure cylinder 4 3 

Total 8 8 

Generators 

Main generator type a-c, 3-phase, 60 cycles, 13,800 v, 2 a-c, 3-phase, 60 cycles, 13,800 v, 2 

poles, 3,600 rpm, .85 pf, hydrogen poles, 3,600 rpm, .85 pf, hydrogen 
cooled, star-connected, single cir- cooled, wye-connected, single cir- 
cuit winding. cuit winding. 

Generator ratings 111,765 leva at 15 psi hydrogen pres- 111,765 leva at 15 psi hydrogen pres- 
sure, sure. 
121,176 kva at 30 psi hydrogen pres- 117,647 kva at 25 psi hydrogen pres- 
sure, sure. 

Main generator exciter 1-300 kw, 250 v, 900 rpm. S'-SOO kw, 250 v, 900 rpm. 

Auxiliary generator a-c, 3-phase, 60 cycles, 2,400 v, 2 a-c, 3-phase, 60 cycles, 2,400 v, 2 

poles, 3,600 rpm, 9,375 kva, 7,500 poles, 3,600 rpm, 9,375 kva, 7,500 
kw at .80 pf, air cooled, star-con- kw at .80 pf, air cooled, wye-con- 
nected, single circuit winding. nected, single circuit winding. 

Auxiliary generator exciter 1-50 kw, 250 v, 900 rpm. 3'-40 kw, 250 v, 900 rpm. 

Generator ventilation Self- ventilated with shaft mounted Self -ventilated with shaft mounted 

fans. fans. 

Hydrogen coolers 4 extended surface, finned tube type, 4 extended surface, finned tube type, 

mounted horizontally in generator mounted vertically in generator 
housing, 900 gpm or 95 F conden- housing, 900 gpm of 95 F conden- 
sate at 100 psi. sate at 100 psi. 

Lubrication system 2 oU coolers using 104 F condensate 2 oil coolers using 104 F condensate 

700 gpm at 100 psi, 4 oil pumps, 1 700 gpm at 100 psi, 4 oil pumps, 1 

shaft mounted, 2 a-c auxiliary and shaft mounted, 2 a-c auxiliary and 

1 d-c back-up. 1 d-c back-up. 
Dimensions of unit: 

Length 79ft3in. 84ftll3iin. 

Width 22 ft in. 16 ft 8% in. 

Height 12 ft 6 in. 11 ft in. 

Weight 1,001,2001b 1,002,6001b 

•Including one spare exciter. 

47 



Turbine Auxiliaries 

3 Condensers, single pass, divided water box, spring 
supported, welded steel shell with storage type deaer- 
ating hotwell, one 50,000 and two 60,000 sq ft sur- 
face Foster Wheeler Corp. 

9,354 Condenser Tubes, per condenser, Ja in. OD by 
24 and 28 ft effective length. No. 18 BWG seam- 
less drawn aluminum brass and aluminum bronze, ar- 
ranged parallel to the turbine shaft with ends rolled 

in without flaring American Brass Co. 

Bridgeport Brass Co. 

Phelps Dodge Copper Products Corp. 

Revere Copper and Brass, Inc. 

6 Circulating Water Pumps, vertical, mixed flow, 
with extended shaft and bottom suction, 47,000 gpm 
at 17 ft total head, 345 rpm Foster Wheeler Corp. 

6 Condensate .\nd Booster Pumps, vertical, centri- 
fugal, four-stage, re-entry type, 2,090 gpm at 517 ft 
total head, 884 rpm 

Worthington Pump & Machinery Corp. 

6 Vacuum Pumps, single-stage rotating plimger type, 
550 cfm at 1.5 in. Hg Kinney Mfg. Co. 

Feedwater System 

9 Boiler Feed Pumps, horizontal, barrel-type, eight- 
stage, centrifugal, 1,115 gpm at 4,680 ft total head, 
3,465 rpm Worthington Pump & Machinery Corp. 

9 Hydraulic Couplings, 2,000 hp, sliding-scoop type, 
variable speed, 3,550 rpm full speed 

American Blower Corp. 

3 Condensate Coolers, horizontal, shell and tube type, 
single-pass, counterflow. Cooling surface 2,560 sq ft, 
700,000 lb per hr of condensate from 115 F to 95 F 
with 1,700,000 lb per hr of salt water at 80 F 

Graham Mfg. Co. 

9 Feedwater Heaters, horizontal, shell and tube, two- 
pass, low-pressure, closed, with % in. OD, 18 BWG 
U-bend Admiralty tubes Westinghouse Electric Corp 

2 Drain Coolers for Units No. 2 and 3, horizontal, 
shell and tube, four-pass, low pressure with % in. OD 
18 BWG U-bend Admiralty tubes 

Westinghouse Electric Corp 

3 Feedwater Heaters, vertical, shell and tube, four 
pass, low-pressure, closed, vdth % in. OD, 18 BWG 
arsenical copper tubes and internal drain coolers 

Foster Wheeler Corp. 

12 Feedwater Heaters, vertical, shell and tube, lock- 
head, with desuperheat zone, two-pass, high-pressure, 
closed, with % in. OD, 13 BWG, 70-30 copper-nickel 
tubes and internal drain coolers Foster Wheeler Corp. 

2 Evaporators, horizontal, submerged coil, self-scal- 
ing, single-effect with 72-1 in. OD, 18 BWG, 80-20 
copper-nickel tubes, 720 sq ft heating surface, 30,000 
lb per hr capacity Foster Wheeler Corp. 

1 Evaporator, horizontal, submerged coil, self-scaling, 
with 247-1 in. OD, 18 BWG, 80-20 copper-nickel 



tubes, 970 sq ft heating surface, 30,000 lb per hr 
capacity Griscom-Russell Co. 

3 Evaporator Deaerators, vertical, steel shell, direct 
contact, spray-type with vent condenser and combined 
storage tank, 30,000 lb per hr capacity 

Worthington Pump & Machinery Corp. 



Steam Generating Units 

3 Boilers, three-drum, water tube, with completely 
water cooled furnaces and continuous slag taps, each 
rated 850,000 lb per hr continuous, and 950,000 lb 
per hr for four hours, at 1,500 psi, 1,050 F. 52,450 
cu ft furnace volume, 15,080 sq ft boiler heating sur- 
face. Three levels of combination coal and oil burners, 
vertically adjustable, tangential comer firing. Welded 
steel casing. Drums are 60 in. ID by 40 ft 5/2 in., 54 
in. ID by 40 ft 232 in., and 27 in. ID by 32 ft 3% in. 
long Combustion Engineering-Superheater, Inc. 

3 Superheaters, two- stage, pendent, convection type. 
First stage 124 five-loop elements, heating surface 
10,000 sq ft; second stage 190 five-loop elements, 
heating surface 31,800 sq ft. Tubes are 2/8 in. OD. 
Superheat control by means of gas by-pass 

Combustion Engineering-Superheater, Inc. 

3 Economizers, continuous tube, counterflow, arranged 
in three sections with 2 in. OD tubes staggered in 
horizontal rows, total heating surface 39,600 sq ft, 
inlet water temperature 455 F, outlet water tempera- 
ture 552 F Combustion Engineering-Superheater, Inc. 

Refractory Walls, sectionally-supported, at super- 
heater and economizer M. W. Detrick Co. 

George Allen & Son 

6 Air Heaters, Ljungstrom, vertical-shaft, regenera- 
tive, heating surface 104,350 sq ft 

Air Preheater Corp. 

6 Forced Draft Fans, variable-speed, 123,000 cfm at 
80 F and 22 in. water, driven through 6 Hydraulic 
Couplings of the continuous pump type, 600 hp, 
1,130 rpm American Blower Corp. 

6 Radiators, air-cooled, for cooling the oil of the forced 
draft fan hydraulic couplings Young Radiator Co. 

2 Induced Draft Fans, variable-speed, 221,000 cfm 
at 321 F and 17.75 in. water, driven through 2 Hy- 
draulic Couplings of the continuous pump type, 
1,250 hp, 600 rpm (for No. 1 Unit) 

American Blower Corp. 

4 Induced Draft Fans, 221,000 cfm at 321 F and 
17.75 in. water with louver-damper control 

American Blower Corp. 

2 Radiators, fan-cooled, for cooling the oil of the in- 
duced draft fan hydraulic couplings 

General Electric Co. 

Insulation, boiler and boiler gas ducts 

Johns-ManviUe Corp. 
H. W. Porter Co. 

Insulation, hot air ducts Chas. S. Wood & Co. 



48 



Soot Blowers, automatic, sequential, pneumatically operated; retracting units operate on 250 psi air and air-puff 

units operate on 320 psi. 

Location Boiler No. 1 Boiler No. 2 Boiler No. 3 

Furnace 10 retracting 10 retracting 10 retracting 

Superheater \ 6 retracting 6 retracting 6 retracting 

'^ ( 8 air-puff 8 air-puff 8 air-puff 

Economizer 9 air-puff 

Economizer baffles 2 air-puff 2 air-puff 2 air-puff 

Outlet ducts 3 air-puff 3 air-puff 

Air heaters 2 single nozzle 2 single nozzle 2 single nozzle 

Diamond Power Specialty Corp. 



Pulverizing Equipment 

9 Pulverizers, revoKing drum, ball mill, Hardinge, 
with double feed and classifiers, 200 rpm, capacity 
37,400 lb per hr, 98 per cent through 50 mesh screen, 
75 per cent through 200 mesh screen; air supply pri- 
mary 23,000 cfm at 280 F, tempering 11,700 cfm at 
100 F Foster Wheeler Corp. 

9 Coal Feeders, table type Foster Wheeler Corp. 

9 Exhausters, 360 rpm, constant speed 

Foster Wheeler Corp. 

Coal Handling System 

Coal Uxloadlng Tower, 700 tons per hr, bucket ca- 
pacity 4 tons, total time for one round trip 20 seconds. 
Barge Puller handles 12,500-ton vessel at 30 fpm 

McKieman-Terry Corp. 

Coal Crusher, Bradford Hammermill, 14 ft by 22 ft, 
600 tons per lir. Product, nominally %, in., all of which 
passes through 1)4 in. round opening, speed of breaker 
cylinder 12 rpm, rotor speed 690-720 rpm, weight 
152,5001b Pennsylvania Crusher Co. 

CoN\-EYiNG Equipment, 600 tons per hr capacity, con- 
sisting of 8 conveyors, traveling tripper, Geary-Jen- 
nings coal sampler, Sturtevant automatic coal crusher 
and sampler, and swing boom 

Robins Conveyors, Division of Hewitt-Robins, Inc. 



CoN\'EYOH Belting 



Thermoid Co. 



Bunker Shuttle Con\eyor 

Robins Convevors, Division of Hewitt-Robins, Inc. 



Magnetic Sep.\rator 
2 Weightometers 



Dings Magnetic Separator Co. 

Merrick Scale Mfg. Co. 

3 Bunkers, capacity 1,800 tons, 8 discharge pockets 
each Connery Construction Co. 

Other Equipment— Fuel Handling 

1 Tractor, Allis-Chalmers, Model HD-19, 163 hp 
Diesel, 2-cycle with Bulldozer, Baker Model 19-5, 
hydraulic, and Scraper, Gar Wood Model 524, 24.1 
cu yd capacity Eastcoast Equipment Co. 



1 Tr.\ctor, Caterpillar Model D-18, 144 hp Diesel, 4- 
cycle, with Bulldozer, Model 82, hydrauUc, and 
Scraper, Model 80, 18 cu yd capacity 

Smith Tractor & Equipment Co. 

Coal Hoppers and Chutes Heilman Boiler Works 
Allied Steel Products Corp. 

G.-vtes in raw coal chutes and at bunker outlets 

Stock Engineering Co. 

Vibrators . W. Richard Witte & Co. 

12 Coal Scales, automatic Richardson Scale Co. 

2 Heaters for fuel oil tank Griscom-Russell Co. 

3 Heaters for fuel oil, feeding burners 

Alco Products Div., American Locomotive Co. 

2 Reclaiming Tanks, 150 gal for fuel oil 

New York Engineering Co. 



Dust Handling Equipment 

3 Dust Collectors, Multiclone-Cottrell. Each boiler 
has one collector consisting of one Multiclone having 
780 tubes, and one Cottrell electrical precipitator con- 
sisting of five units mounted in one shell. Each unit of 
the precipitator has fifteen ducts made of e.xpanded 
metal collecting electrodes on 9 in. centers. The units 
are separated by division walls. Draft loss at 400,000 
cfm gas flow 2.47 in. water 

Western Precipitation Corp. 

Dust Conveying System, Fuller-Kinyon Fuller Co. 

Redler Conneyors between precipitators and dust 
pump hoppers Stephens- Adamson Mfg. Co. 

\'.\Ri.\BLE Speed Drixes for Redler conveyors 

Reeves Pulley Co. 

3 Screw Conveyors between economizers and dust 
pump hopper Link Belt Co. 

Rotary Vane Feeder Equipment, Star Feeder 
Valves for precipitator and economizer hoppers 

United Conveyor Corp. 

Storage Silo for dust Heilman Boiler Works 



49 



Ash Handling Equipment 

3 Sluicing Systems each consisting of an ash storage 
hopper of 100,000 lb capacity, sump tank, 2,000 gpm 
pump; and one ash dewatering and storage type hy- 
drobin of 4,000 cu ft capacity 

Allen-Sherman-Hoff Co. 

Mechanical Control Systems 

Automatic Combustion Control 

Automatic Pressure Controls 

Ain'OMATic Water-Level Controls 

Automatic Temperature Controls Hagan Corp. 

Automatic Feedwater Control of boiler feed pump 
speed, three-element type Bailey Meter Co. 

Automatic Superheater-Temperature Control 

Leeds & Northnip Co. 

Instruments and Meters 

Boiler Meters 

Level Recorders for water storage tanks 

Tide Level Recorder Bailey Meter Co. 

2— 160-Point Recorders for superheater tube tempera- 
tures and important bearing temperatures (for two 

units) 

1— 90-Point Recorder for miscellaneous temperatures 

(for two units) 
3— CO2 Recorders 
3— pH Recorders 
3— Conductivity Recorders Leeds & Northrup Co. 

Remote Liquid Level Indicators for boiler drum 
water level Yamall-Waring Co. 

Sight Flow Indicators 
Water-Level Gages, miscellaneous 

Ernst Water Column & Gage Co. 

Boiler Gage Glasses, clear and bi-color for boiler drum 
water level Diamond Power Specialty Co. 

AsHCHOFT Duragages Hajoca Corp. 

Indicating Thermometers 

Draft Gages 

Recorders for steam flow and miscellaneous pressures 

Republic Flow Meters Co. 

Manometers 

Controllers for liquid level Moore Products 

Industrial Thermometers 

Vacuum Colitmns Taylor Instrument Cos. 

Manometers, U-type Meriam Instrument Co. 

Automatic Gage for fuel oil storage tank 

Jormson & Jennings Co. 

Liquid Level Controllers for feedwater heaters and 
evaporators Fisher Governor Co. 

Level Indicators for hoppers at dust pumps . Fuller Co. 



Pumps 

4 Salt Water Service Pumps, DeLaval, vertical, cen- 
trifugal, single-stage, 2,500 gpm at 250 ft total head, 
1,760 rpm Turbine Equipment Co. 

3 Slitice Pumps, horizontal, centrifugal, single-stage, 

mixed flow, 2,000 gpm at 25 ft total head, 1,150 rpm 

Worthington Pump & Machinery Corp. 

1 Fire Pump, horizontal, centrifugal, single-stage, 1,800 
gpm at 162 ft total head, 1,750 rpm 

Goulds Pumps, Inc. 

2 Acid Cleaning Pumps, horizontal, centrifugal, single- 
stage, 1,000 gpm at 70 ft total head, 1,750 rpm 

Worthington Pump & Machinery Corp. 

2 Condensate Storage Pumps, vertical, centrifugal, 
single-stage, 600 gpm at 135 ft total head, 3,500 rpm 

Ingersoll-Rand Co. 

1 City Water Booster Pump, horizontal, centrifugal, 

single-stage, 500 gpm at 125 ft total head, 3,450 rpm 

Goulds Pumps, Inc. 

10 Sump Pumps, vertical, centrifugal, single-stage, 8 at 
100 gpm, 2 at 300 gpm capacity 

Quimby Pump Div., H. K. Porter Co., Inc. 

3 Fuel Oil Pumps, vertical, rotary screw, DeLaval, 140 
gpm at 750 ft total head, 1,150 rpm 

Turbine Equipment Co. 

] Condensate Return Pump, horizontal, centrifugal, 

single-stage, 120 gpm at 288 ft total head, 3,550 rpm 

Worthington Pump & Machinery Corp. 

3 Evaporator Feed Pumps, vertical, centrifugal, sin- 
gle-stage, 60 gpm at 304 ft total head, 3,550 rpm 

Goulds Pumps, Inc. 

1 Chemical Feed Pump, vertical, triplex, single-acting, 
plimger type, high-pressure, 8.6 gpm at 4,140 ft total 
head, 420 rpm 

Worthington Pump & Machinery Corp. 

4 Chemical Feed Pumps, volume-controlled, simplex 
type, 36 gpm at 679 ft total head Milton Roy, Inc. 

Air Compressors 

4 Control Am Compressors, horizontal, carbon-ring, 
single-stage, 150 cfm at 100 psi, 325 rpm 

Ingersoll-Rand Co. 

1 Station Service Air Compressor, horizontal, du- 
plex, two-stage, reciprocating, 660 cfm at 125 psi, 360 
rpm Ingersoll-Rand Co. 

2 Soot Blower Air Compressors, horizontal, rotary, 
two-stage, low-pressure (0 to 120 psi), 1,035 cfm at 
120 psi, 575 rpm Fuller Co. 

2 Soot Blower Air Compressors, horizontal, single- 
stage, high-pressure (120 to 500 psi), 1,000 cfm at 
500 psi, 277 rpm Ingersoll-Rand Co. 

1 Dust System Air Compressor, horizontal, rotary, 
single-stage, 603 cfm at 25 psi, 710 rpm Fuller Co. 

6 Air Dryers, dual tower silica gel for control air 

Dehydraire Corp. 



50 



Piping 

Main Steam and High-Pbessure Boiler Feed 

M. W. Kellogg Co. 
Intermediate and Low-Pressure 

Midwest Piping and Supply Co. 
Cornell & Underhill, Inc. 

Circulating Water, 48 in. reinforced concrete 

Lock Joint Pipe Co. 

Strainers Andale Co. 

LesUe Co. 
Elliott Co. 

Rubber Expansion Joints 

Moisson Packing & Rubber Co. 

Expansion Joints J. Kopperman & Sons 

Condenser Tail Pipes Warren Foundry & Pipe Co. 

Copper Tubing for control air 

Chase Brass & Copper Co. 

Yahway Steam Traps Crane & Milligan 

Lead Lined Steel Pipe for acid systems 

National Lead Co. 

Insulation for piping and ducts Chas. S. Wood & Co. 



Valves 

Steel Gate and Check Valves, high-pressure 

The Lunkenheimer Co. 

Steel Gate and Check Valves William Powell Co. 

Walworth Co. 

Safety Valves Manning, Maxwell & Moore, Inc. 

Foster Engineering Co. 

Bleeder Check Valves Schutte & Koerting Co. 

Boiler Blowdown Valves Yamall- Waring Co. 

Regulating Valves Bailey Meter Co. 

Fisher Governor Co. 
Swartwout Co. 
Schutte & Koerting Co. 
FBESSimE Relief Valves 

Manning, Maxwell & Moore, Inc. 

Farris Engineering Co. 

Crosby Steam Gage & Valve Co. 

Iron Valves Crane Co. 

Chapman Valve Mfg. Co. 
Darling Valve and Mfg. Co. 
Walworth Co. 
Butterfly Valves for circulating water 

Henry Pratt Co. 

Valve Operators, air and electric, Limitorque 

Philadelphia Gear Works 

Tanks and Receivers 

3 Water Storage Tanks, 125,000 gal 

Bethlehem Steel Co. 
3 Gland Seal Tanks 
3 Drain Tanks Heilman Boiler Works 



3 Lubricating Oil Storage Tanks, 4,500 gal 

1 Condensate Head Tank, 10,000 gal 

2 Acid Cleaning System Storage Tanks, 10,000 gal 

McCarter Iron Works 

1 Fuel Oil Storage Tank, 10,000 gal, for heating 
boiler 

4 Transil Oil Storage Tanks, two 20,000 gal and two 
5,000 gal 

6 Air Receivers, three 180 cu ft and three 60 cu ft 
at 135 psi Buffalo Tank Corp. 

1 Air Receiver, 1,000 cu ft, 500 psi 

A. O. Smith Corp. 

3 Air Receivers, 60 cu ft, 320 psi, for soot blowing 

Alco Products Div., American Locomotive Co. 

Condensate Return System Equipment 

Gale Engineering Co. 

2 Lubricating Oil Receiving Tanks, 5,000 gal 

Buffalo Tank Corp. 
Eastern Steel Tank Corp. 

3 Slowdown Tanks L. O. Koven & Brother, Inc. 

Chemical Measuring and Mixing Tanks 

Bussler Metal Works 
Buffalo Tank Corp. 
1 Caustic Soda Tank 
1 Sulphuric Acid Tank Buffalo Tank Corp. 

1 Phosphoric Acid Tank 

Derkiss Lead Burning Contractors 



Miscellaneous 

Turbine Room Crane, 150 ton Whiting Corp. 

Hoists and Trolleys Ingersoll-Rand Co. 

Philadelphia Chain Block & Mfg. Co. 
Yale & Towne Mfg. Co. 

6 Sluice Gates operated by air motors 

Coldwell- Wilcox Division, Krajewski Pesant Mfg. Corp. 

5 Traveling Water Screens, basket type 

Link-Belt Co. 

1 Traveling Water Screen, with continuous screen 
cloth Stephens-Adamson Mfg. Co. 

Chlorination Equipment 

Wallace & Tieman Products, Inc. 

Zeolite Water Softening Equipment 

Worthington Pump & Machinery Corp. 

4 Oil Purifying Equipments, DeLaval, for turbine and 
transil oil Turbine Equipment Co. 

2 Capstan Dock Winches Silent Hoist & Crane Co. 

Heat Insulation for equipment Chas. S. Wood & Co. 

Ventilation Systems, 

Air Conditioning of Control Rooms 

Buensod-Stacey, Inc. 

5 Ventilating Fans, with vane control 

Buffalo Forge Co. 

Air Filters American Air Filter Co. 



51 



Heating Coils American Blower Corp. 

Auxiliary Ventilating Fans Henricksen, Inc. 

Trane Co. 

American Blower Corp. 

American Machine & Metals, Inc. 

2 Elevators in Boiler House Otis Elevator Co. 

Westinghouse Electric Corp. 

1 Elevator in Service Building Otis Elevator Co. 

Heating Boiler Cleaver-Brooks Co. 

Deaerator for heating boiler, 20,000 lb per hr 

Worthington Pump & Machinery Corp. 

Heating and Plumbing Systems 

F. & W. V. Engelberger Co. 

2 Duplex Sewage Ejectors Nash Engineering Co. 

Machine Tools Vandyck Churchill Co. 

Cafeteria Equipment . Nathan Straus Duparquet, Inc. 

Laboratory Chemical Equipment Eimer& Amend 

Chas. C. Phelps Co. 
Test Department Furniture 

Laboratory Equipment Co. 

Office Furniture The General Fireproofing Co. 

Lockers General Steel Products Sales Co., Inc. 

Laundry Equipment ..American Laundry Machine Co. 

Fire Protection Equipment 

CO2 Fire Equipment Co. 

Walter Kidde Co. 

Grinnell Co. 

Smith Corp. 

Wirt and Knox Mfg. Co. 

American LaFrance Foamite Co. 

Electrical Equipment for the First Three 
Units 

Motor Driven Exciter Sets 

3 Exciter Sets consisting of a 500 hp, 2,300 v, three- 
phase, 60 cycle, 896 rpm squirrel cage induction mo- 
tor mounted on same base with one 300 kw, 250 v 
and one 40 kw, 250 v shunt wound d-c generators for 
main and auxiliary generator fields. One set is a spare 

General Electric Co. 

1 Exciter Set consisting of a 530 hp, 2,300 v, three- 
phase, 60 cycle, 893 rpm squirrel cage induction mo- 
tor mounted on same base with one 300 kw, 250 v 
and one 50 kw, 250 v shunt wound d-c generators for 
main and auxihary generator fields 

Westinghouse Electric Corp. 

Main Transformers 

4 Transformers, three-phase, 13.2 kv delta to 27.72 
kv star OISC, having a self-cooled rating of 30,936 
kva and a forced oil rating of 51,000 kva 

General Electric Co. 

4 Transformers, three-phase, 13.2 kv delta to 138.6 



kv star, having a self-cooled rating of 44,600 kva, a 
forced air rating of 56,000 kva and a forced air forced 
oil rating of 85,000 kva ...Westinghouse Electric Corp. 

Auxiliary Power Transformers 

4 Transformers, 4,000 kva, OISC, three-phase, 26.4 
kv delta to 2,400 v star. Used for stepping down trans- 
mission voltage for station auxiliaries 

Moloney Electric Co. 

3 Transformers, 1,500 kva, OISC, three-phase, 2,400 

V delta to 480 v star for stepping down voltage for 
miscellaneous station auxiUaries 

6 Transformers, 500 kva, OISC, three-phase, 2,400 

V delta to 480 v star for stepping down voltage for 
miscellaneous station auxiliaries 

1 Transformer, 750 kva, OISC, three-phase, 2,400 

V delta to 480 v star for coal handling system 

1 Transformer, 200 kva, OISC, three-phase, 2,400 

V delta to 480 v star for coal handling system 

AUis-Chalmers Mfg. Co. 

Oil Circuit Breakers 

6 Oil Circuit Breakers, Type GO-5B, 4,000 amp, 
15-kv class, 23-kv insulation having interrupting ca- 
pacity of 1,500,000 kva at rated voltage, 125 v d-c 
solenoid-operated, used as generator breakers 

2 Oil Circuit Breakers, Type GO-4B, 1,200 amp, 
34.5 kv, having an interrupting capacity of 1,500,000 
kva at rated voltage, 125 v, d-c solenoid-operated, 
used on 26-kv feeds to auxihary power transformers 

1 Oil Circuit Breaker, Type GM-4, 800 amp, 138 kv, 
having an interrupting capacity of 3,500,000 kva at 
rated voltage, 125 v, d-c solenoid-operated, used for 
132-kv bus section breaker 

Westinghouse Electric Corp. 

Motors 

All motors are drip-proof squirrel cage induction motors 

unless otherwise noted. 
3-2,000 hp, 2,400 v, 3,600 Tpm, totally enclosed, water 

cooled for boiler feed pumps 
6-1,250 hp, 2,400 v, 600 rpm, totally enclosed, fan 

cooled for induced draft fans 
6-600 hp, 2,400 v, 1,200 rpm, totally enclosed, fan 

cooled for forced draft fans 
2—400 hp, 2,400 v, 900 rpm for condensate pumps 
3-350 hp, 2,400 v, 360 rpm for pulverizers 
2-300 hp, 2,400 v, 360 rpm, totally enclosed, fan cooled 

for circulating pumps of No. 3 Unit 
9—200 hp, 2,400 v, 1,200 rpm for pulverizer exhausters 
3—200 hp, 440 V, 900 rpm for ash sluicing pumps 
1—100 hp, 440 V, 1,800 rpm for city water booster pump 
3—75 hp, 440 V, 1,200 rpm for main ventilating fans 
4—40 hp, 440 V, 1,800 rpm for control air compressors 
4—40 hp, 440 V, 1,200 rpm for vacuum pumps 

Alhs-Chalmers Mfg. Co. 



52 



3-500 hp, 2,400 v, 900 rpm for No. 2, 3 and spare 
exciters 

2—250 hp, 2,400 v, 600 rpm for soot blower rotary air 
compressors 

2-125 hp, 2,400 v, 277 rpm, synchronous for soot 
blower reciprocating air compressors 

1—150 hp, 440 V, 360 rpm, synchronous for station serv- 
ice air compressor 

2—100 hp, 440 V, 3,600 rpm for auxiliary oil pumps 

3—60 hp, 440 V, 1,200 rpm, totally enclosed, fan cooled 
for dust pumps 

1—60 hp, 440 V, 720 rpm for dust air compressor 

1-50 hp, 440 V, 720 rpm for Bradford breaker, totally 

enclosed, fan cooled ^ , „, . _ 

General Electric Co. 

6-2,000 hp, 2,400 v, 3,600 rpm, totally enclosed, water 

cooled for boiler feed pumps 
1-530 hp, 2,400 V, 900 rpm for No. 1 exciter 
1-400 hp, 2,400 V, 1,800 rpm, totally enclosed, fan 

cooled for main coal hoist 
4—400 hp, 2,400 v, 900 ipm for condensate pumps 
6-350 hp, 2,400 v, 360 rpm for pulverizers 
4—300 hp, 2,400 v, 360 rpm for circulating pumps 
3—200 hp, 440 V, 1,800 rpm for salt water pumps 
1—200 hp, 440 V, 1,800 rpm, totally enclosed, fan cooled 

for salt water pumps 
1—200 hp, 440 V, 720 rpm, totally enclosed, fan cooled 

for Bradford breaker 
2—100 hp, 440 V, 1,200 rpm, totally enclosed, fan cooled 

for coal conveyors 
3—50 hp, 440 v, 1,200 rpm, totally enclosed, fan cooled 

for coal conveyors 
3—50 hp, 440 v, 1,200 rpm for fuel oil pumps 
1—40 hp, 440 v, 1,200 rpm for auxihary oil pump 
2—40 hp, 440 V, 900 rpm for capstans, totally enclosed 
2—40 hp, 440 V, 400 rpm for vacuum pumps 

Westinghouse Electric Corp. 

Disconnecting Switches 

For Bus Sectionalizing and Selection, and Equipment 
Isolation 

23 Switches, outdoor, 7.5 and 23 kv, 400, 3,000 and 
4,000 amp. Type 3PST Delta Star Electric Co. 

47 Switches, indoor, 7.5 and 23 kv, 600, 2,500 and 
5,000 amp. Type 3PST Pringle Mfg. Co. 

39 Switches, indoor and outdoor, 23, 34.5 and 138 kv, 
400, 600, 1,200 and 2,000 amp. Type 3PST 

Railway and Industrial Engineering Co. 

Lightning Arresters 

3 Lightning Ahresters, type SV, three-phase, 15 kv 
for ungrounded system for surge protection of No. 1 
Generator Westinghouse Electric Corp. 

6 Lightning Arresters, station type Thyrite, three- 
phase, 15 kv for ungrounded system for surge pro- 
tection of No. 2 and 3 Generators 

General Electric Co. 



Reactors 

9 Reactors, single-phase, 60 cycle, middle-tap, double- 
flow, 13.8 kv, having end to end reactive drop of 13.6 
per cent and having balanced load ± VA per cent. 
Current rating at middle tap of 5,000 amp and at end 
taps of 4,000 amp. For current limiting reactors on 
main generators General Electric Co. 

Storage Batteries 

1 Storage Battery, Type Exide FM-17, 120 cells, con- 
nected for 125 V. Plates: Manchester-Positive and 
Box-Negative. For control system 

1 Storage Battery, Type Exide FM-17, 120 cells, con- 
nected for 125 and 250 v. Plates: Manchester-Posi- 
tive and Box-Negative. For valve control and emer- 
gency lighting Electric Storage Battery Co. 

Fuse and Resistor Mountings 

18 Fuse and Resistor Mountings, outdoor, 23 kv, sin- 
gle-pole, stick -operated, with S&C Elec. Co. Type 
RRO, 60-ohm resistors and Type D, 5-amp fuses. For 
potential transformer protection 

Delta Star Electric Co. 

18 Fuse and Resistor Mountings, indoor, having same 
resistors and fuses as above S&C Elec. Co. 

Metal-Clad Switchgear 

13 Groups of 2,400-V Metal-Clad Switchgear 
equipped with Type DH air circuit breakers from 600- 
to 2,000-amp rating and 100,000-kva interrupting 
rating. Number of positions per group range from 
2 to 8 

12 Groups of 440-V Metal-Clad Switchgear equipped 
with 600 V Type DB air circuit breakers from 15- to 
600-amp rating and 25,000-kva interrupting rating. 
Number of positions per group range from 6 to 18 

Westinghouse Electric Co. 

220-V Load Centers 

8 220-V Load Centers equipped with Type DB air 
circuit breakers from 15- to 225-amp rating and 
25,000-kva interrupting rating. Two load centers each 
of 100-, 150-, 200- and 300-kva b-ansformer capacity. 
Number of positions per group range from 6 to 21 

2 220-V Load Centers equipped with Type AB air 
circuit breakers of 10,000-kva interrupting capacity. 
One of 100-kva transformer capacity with 9 positions 
and one of 150-kva transformer capacity of 21 posi- 
tions. Breakers per group range from 15- to 150-amp 
rating Westinghouse Electric Corp. 

10 220-V Load Centers equipped with Type KA air 
circuit breakers from 3- to 225-amp rating and 
15,000-kva interrupting rating. Number of positions 
per group range from 6 to 21 

4 220-V Load Centers equipped with Type ET air 
circuit breakers from 15- to 150-amp rating and 
10,000-kva interrupting rating. Number of positions 
range from 11 to 22 I-T-E Circuit Breaker Co. 



53 



Transformer Cooling Fans Fuse and Resistor Mountings 

238 Transformer Cooling Fans, portable, outdoor type 14 Fuse and Resistor Mountings, outdoor, 34.5 kv, 

capable of dehvering 6,000 cfm of free air through a single-pole, stick-operated with S&C Elec. Co. Type 

31/i-in. ring 10 ft in front of fan. Motors rated at 1 hp, RRO, 60-ohm resistors and Type D, 5-amp fuses. For 

220 V, three-phase, 60 cycles, totally enclosed potential transformer protection 

Diehl Mfg Co. 6 Fuse and Resistor Mountings, outdoor, 34.5 kv, 

single-pole, stick-operated with S&C Elec. Co. Type 

Electrical Equipment-Sew aren Switching rro, 3.5-ohm resistors and Type D, 15-amp fuses. 

Station ^°'' auxiliary power transformer protection 

^■1/^- ._. n T Delta Star Electric Co. 
Oil Circuit Breakers 

4 Oil Circuit Breakers, Type GO-4B, 2,000 amp. Auxiliary Power Transformers 

34.5 kv having interrupting capacity of 1,500,000 q Auxiliary Power Transformers, 27.72 kv to 120/ 

kva at rated voltage. Used as transformer breakers £40 v, 75 kva, OISC, single-phase, distribution type ' 

7 Oil Circuit Breakers, Type GO-4B, 1,200 amp, American Transformer Co. 
34.5 kv having interrupting capacity of 1,500,000 kva 

at rated voltage. Used as feeder breakers Storage Battery 

° 'Pi Storage Battery, Type Exide FM-11, 60 cells, con- 

Disconnecting Switches nected for 125 v. Plates: Manchester-Positive and 

Box-Negative. For breaker operation and emergency 

8 Disconnecting Switches, Type TTR-U-4, 2,000 amp, hghting Electric Storage Battery Co. 
34.5 kv, horizontally mounted, hand gang-operated. 



Reactors 



Used as transformer and bus section disconnects 
7 Disconnecting Switches, Type TTR-U-4, 1,200 amp, 

34.5 kv, horizontally mounted, hand gang-operated. 2 Reactors, three-phase, OISC, 60 cycle, 27 kv, hav- 

Used as feeder disconnects ing reactive drop of 7.5 per cent. For two feeder po- 

Railway and Industrial Engineering Co. sitions Westinghouse Electric Corp. 

Protective Relays— Sewaren Generating and Switching Stations 

Equipment Type of Protection Manufacturer and Type 

Main Generator Phase DifiFerential Westinghouse, HA 

Neutral Ground Westinghouse, COH 

13-Kv Bus Phase Differential Westinghouse, CA-6 

13-Kv/132-Kv Transformer Phase Differential Westinghouse, CA 

Neutral Ground Westinghouse, CO 

Pressure Relay General Electric, E-1 

13-Kv Side Ground Indication Westinghouse, CV 

132-Kv Lines Phase and Ground General Electric, GCX, CKCP 

and TypeKCS-7 Carrier Current 

Back-up Ground Westinghouse, CRCH and CRC 

Reserve Phase Westinghouse, HCZ 

Reserve Ground Westinghouse, CO 

13-Kv/26-Kv Transformer Phase Differential Westinghouse, CA-6 

Pressure Relay General Electric, E-1 

13-Kv Side Ground Indication Westinghouse, C V 

26-Kv Lines Phase Westinghouse, HCB 

Ground Westinghouse, COH 

Pilot Wire Supervision Westinghouse, PS-1 

26-Kv/2,400-v Station Power 

Transformer Phase Differential Westinghouse, CA-6 

Ground Westinghouse, COH 

Overload Westinghouse, CO 

Pressure Relay General Electric, E-1 

Auxiliary Generator Phase Differential Westinghouse, HA 

Neutral Ground Westinghouse, CO 

54 



Protective Relays— Continued 

2,400-v Buses Phase Differential Westinghouse, CA and CA-6 

Ground Westinghouse, COH 

2,400-v Feeders Overload Westinghouse, CO 

Cable Fault Westinghouse, SC 

Ground Westinghouse, COH 

Miscellaneous Electrical Equipment Sewaren Generating and Switcidng Stations 



Bus— Aluminum Aluminum Co. of America 

—Copper Phelps Dodge Copper 

Products Corp. 

Wire and Cable The Okonite Co. 

The Okonite-Callender 

Cable Co. 
Phelps Dodge Copper 

Products Corp. 
General Cable Corp. 
General Electric Co. 
Rockbestos Products Corp. 
American Metal Molding Co. 
R. B. Dana Co. 
Aluminum Co. of America 

Oilostatic Cable The Okonite-Callender 

Cable Co. 
Conduit 

—Iron Youngstown Sheet & Tube Co. 

Spang-Chalfant Div., 
National Supply Co. 

—Flexible Metallic American Metal Molding Co. 

American Brass Co. 

—Aluminum Aluminum Co. of America 

— Transite Johns-Manville Corp. 

Conduit Fittings Grouse-Hinds Co. 

Appleton Electric Co. 

Thomas & Betts Co. 

Russell & Stoll Co. 

Cable Trays Sun Electric Products, Inc. 

Metal Boxes Sun Electric Products, Inc. 

Metal Enclosures Falstrom Company 

Safety Switches Westinghouse Electric Corp. 

Trimibull Elec. Mfg. Co. 

Wiring Devices Harvey Hubbell, Inc. 

Russell & Stoll Co. 
W. F. Hessell Co. 

Metal Enclosed Bus Railway and Industrial 

Engineering Co. 

Panels Westinghouse Electric Corp. 

Falstrom Company 
Indicating Ammeters 

and Voltmeters Weston Electrical 

Instrument Corp. 

Recording Ammeters 

and Voltmeters Esterline- Angus Co. 

Recording Load and 

Temperature Meters . ..Leeds & Northrup Co. 

Supervisory Control Control Corporation 



Resistors Hardwick-Hindle, Inc. 

Connectors— Copper Delta-Star Electric Co. 

Thomas St Betts Co. 
Bumdy Engineering Co. 
—Aluminum ...Aluminum Co. of America 

Bus Clamps Economy Foundry Co. 

Aluminimi Co. of America 
Delta-Star Electric Co. 
Copper Flexible 

Connectors Railway and Industrial 

Engineering Co. 
Delta-Star Electric Co. 

Bus Supports Lapp Insulator Co. 

Porcelain Wall Bushings ..Lapp Insulator Co. 
Transmission Line 

Hardware Locke Insulator Corp. 

Transmission Line 

Insulators Locke Insulator Corp. 

Terminal Blocks Burke Electric Co. 

Potheads Delta-Star Electric Co. 

Ohio Brass Co. 

Heaters E. L. Wiegand Co. 

Interlocks The Superior Appliance Co. 

Contactors Cutler-Hammer, Inc. 

Westinghouse Electric Corp. 

General Electric Co. 

Automatic Sviatch Co. 

Lighting Cabinets Westinghouse Electric Corp. 

D-C Distribution Cabinets. Westinghouse Electric Corp. 
A-C Distribution Cabinets . Westinghouse Electric Corp. 

Battery Chargers 

—Tube Type General Electric Co. 

-M-G Sets Allis-Chalmers Mfg. Co. 

Concrete Cell Brick Makin Mfg. Co. 

Current Transformers General Electric Co. 

Westinghouse Electric Corp. 
Potential Transformers ...General Electric Co. 

Westinghouse Electric Corp. 

Telephone Booths Burgess Maiming Co. 

Lighting Fixtures Westinghouse Electric Corp. 

Holophane Co. Inc. 

General Lighting Products Co. 

Benjamin Elec. Mfg. Co. 

Day-Brite Lighting, Inc. 

Silvray Lighting, Inc. 

The Frink Corp. 

A. Ward Hendrickson & Co. 
Public Address System Western Electric Co. 



55